{"Entry":{"collection":"tool","key":"pg-isready","name":"pg_isready","aliases":["pg_isready"],"metadata":{"aliases":["pg_isready"],"category":"Client applications","content_hash":"bdfdb5489c48c924f8d75f9134db561d2dd06e910602607c57aafeee19e11dfa","imported_at":"2026-09-30T00:40:34.29983+08:00","name":"pg_isready","name_zh":"","slug":"pg-isready","summary":"pg_isready — check the connection status of a PostgreSQL server"}},"Definition":{"Collection":"tool","Key":"pg-isready","SourceDatabase":"center","Version":"18","SourceTable":"command_tool","SourceKey":"pg-isready","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","Facts":{"comparison_data":{"environment":[],"options":[{"description":"Specifies the name of the database to connect to. The dbname can be a connection string . If so, connection string parameters will override any conflicting command line options.","names":["-d dbname","--dbname= dbname"],"signature":"-d dbname --dbname= dbname"},{"description":"Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket.","names":["-h hostname","--host= hostname"],"signature":"-h hostname --host= hostname"},{"description":"Specifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the PGPORT environment variable or, if not set, to the port specified at compile time, usually 5432.","names":["-p port","--port= port"],"signature":"-p port --port= port"},{"description":"Do not display status message. This is useful when scripting.","names":["-q","--quiet"],"signature":"-q --quiet"},{"description":"The maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds.","names":["-t seconds","--timeout= seconds"],"signature":"-t seconds --timeout= seconds"},{"description":"Connect to the database as the user username instead of the default.","names":["-U username","--username= username"],"signature":"-U username --username= username"},{"description":"Print the pg_isready version and exit.","names":["-V","--version"],"signature":"-V --version"},{"description":"Show help about pg_isready command line arguments, and exit.","names":["-?","--help"],"signature":"-? --help"}],"synopsis":["pg_isready [ connection-option ...] [ option ...]"]},"comparison_hash":"8525c44d4a3f398e1aee9846a2dc02320c2b9e94d11f3ae9c90992fcbb0c5455","description":["pg_isready — check the connection status of a PostgreSQL server"],"environment":[],"facts":[{"label":"Documented executable","value":"pg_isready"},{"label":"Executable version","value":"18.6"},{"label":"Reference inventory","value":"Client applications"},{"label":"Option definition groups","value":"8"}],"manual_html":"\u003cdiv\u003e\u003cdiv class=\"refentry\" id=\"APP-PG-ISREADY\"\u003e\n\u003cdiv class=\"titlepage\"\u003e\u003c/div\u003e\n\u003cdiv class=\"refnamediv\"\u003e\n\u003ch2\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e\u003c/span\u003e\u003c/h2\u003e\n\u003cp\u003epg_isready — check the connection status of a \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e server\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsynopsisdiv\"\u003e\n\u003ch2\u003eSynopsis\u003c/h2\u003e\n\u003cdiv class=\"cmdsynopsis\"\u003e\n\u003cp id=\"id-1.9.4.16.4.1\"\u003e\u003ccode class=\"command\"\u003epg_isready\u003c/code\u003e [\u003cem class=\"replaceable\"\u003e\u003ccode\u003econnection-option\u003c/code\u003e\u003c/em\u003e...] [\u003cem class=\"replaceable\"\u003e\u003ccode\u003eoption\u003c/code\u003e\u003c/em\u003e...]\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-DESCRIPTION\"\u003e\n\u003ch2\u003eDescription\u003c/h2\u003e\n\u003cp\u003e\u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e is a utility for checking the connection status of a \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e database server. The exit status specifies the result of the connection check.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-OPTIONS\"\u003e\n\u003ch2\u003eOptions\u003c/h2\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-d \u003cem class=\"replaceable\"\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--dbname=\u003cem class=\"replaceable\"\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the name of the database to connect to. The \u003cem class=\"replaceable\"\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e can be a \u003ca class=\"link\" href=\"/docs/18/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1. Connection Strings\"\u003econnection string\u003c/a\u003e. If so, connection string parameters will override any conflicting command line options.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-h \u003cem class=\"replaceable\"\u003e\u003ccode\u003ehostname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--host=\u003cem class=\"replaceable\"\u003e\u003ccode\u003ehostname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-p \u003cem class=\"replaceable\"\u003e\u003ccode\u003eport\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--port=\u003cem class=\"replaceable\"\u003e\u003ccode\u003eport\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the \u003ccode class=\"envar\"\u003ePGPORT\u003c/code\u003e environment variable or, if not set, to the port specified at compile time, usually 5432.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-q\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--quiet\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDo not display status message. This is useful when scripting.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-t \u003cem class=\"replaceable\"\u003e\u003ccode\u003eseconds\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--timeout=\u003cem class=\"replaceable\"\u003e\u003ccode\u003eseconds\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eThe maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-U \u003cem class=\"replaceable\"\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--username=\u003cem class=\"replaceable\"\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eConnect to the database as the user \u003cem class=\"replaceable\"\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e instead of the default.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-V\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--version\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003ePrint the \u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e version and exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-?\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--help\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eShow help about \u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e command line arguments, and exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.4.16.7\"\u003e\n\u003ch2\u003eExit Status\u003c/h2\u003e\n\u003cp\u003e\u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e returns \u003ccode class=\"literal\"\u003e0\u003c/code\u003e to the shell if the server is accepting connections normally, \u003ccode class=\"literal\"\u003e1\u003c/code\u003e if the server is rejecting connections (for example during startup), \u003ccode class=\"literal\"\u003e2\u003c/code\u003e if there was no response to the connection attempt, and \u003ccode class=\"literal\"\u003e3\u003c/code\u003e if no attempt was made (for example due to invalid parameters).\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.4.16.8\"\u003e\n\u003ch2\u003eEnvironment\u003c/h2\u003e\n\u003cp\u003e\u003ccode class=\"command\"\u003epg_isready\u003c/code\u003e, like most other \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e utilities, also uses the environment variables supported by \u003cspan class=\"application\"\u003elibpq\u003c/span\u003e (see \u003ca class=\"xref\" href=\"/docs/18/libpq-envars.html\" title=\"32.15. Environment Variables\"\u003eSection 32.15\u003c/a\u003e).\u003c/p\u003e\n\u003cp\u003eThe environment variable \u003ccode class=\"envar\"\u003ePG_COLOR\u003c/code\u003e specifies whether to use color in diagnostic messages. Possible values are \u003ccode class=\"literal\"\u003ealways\u003c/code\u003e, \u003ccode class=\"literal\"\u003eauto\u003c/code\u003e and \u003ccode class=\"literal\"\u003enever\u003c/code\u003e.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-NOTES\"\u003e\n\u003ch2\u003eNotes\u003c/h2\u003e\n\u003cp\u003eIt is not necessary to supply correct user name, password, or database name values to obtain the server status; however, if incorrect values are provided, the server will log a failed connection attempt.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-EXAMPLES\"\u003e\n\u003ch2\u003eExamples\u003c/h2\u003e\n\u003cp\u003eStandard Usage:\u003c/p\u003e\n\u003cpre class=\"screen\"\u003e\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003epg_isready\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e/tmp:5432 - accepting connections\u003c/code\u003e\n\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e0\u003c/code\u003e\n\u003c/pre\u003e\n\u003cp\u003eRunning with connection parameters to a \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e cluster in startup:\u003c/p\u003e\n\u003cpre class=\"screen\"\u003e\u003ccode class=\"prompt\"\u003e$ \u003c/code\u003e\u003cstrong class=\"userinput\"\u003e\u003ccode\u003epg_isready -h localhost -p 5433\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003elocalhost:5433 - rejecting connections\u003c/code\u003e\n\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e1\u003c/code\u003e\n\u003c/pre\u003e\n\u003cp\u003eRunning with connection parameters to a non-responsive \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e cluster:\u003c/p\u003e\n\u003cpre class=\"screen\"\u003e\u003ccode class=\"prompt\"\u003e$ \u003c/code\u003e\u003cstrong class=\"userinput\"\u003e\u003ccode\u003epg_isready -h someremotehost\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003esomeremotehost:5432 - no response\u003c/code\u003e\n\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e2\u003c/code\u003e\n\u003c/pre\u003e\n\u003c/div\u003e\n\u003c/div\u003e\u003c/div\u003e","manual_path":"app-pg-isready.html","options":[{"description":"Specifies the name of the database to connect to. The dbname can be a connection string . If so, connection string parameters will override any conflicting command line options.","names":["-d dbname","--dbname= dbname"],"signature":"-d dbname --dbname= dbname","source_url":"/docs/18/app-pg-isready.html","summary":"Specifies the name of the database to connect to. The dbname can be a connection string . If so, connection string parameters will override any conflicting command line options."},{"description":"Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket.","names":["-h hostname","--host= hostname"],"signature":"-h hostname --host= hostname","source_url":"/docs/18/app-pg-isready.html","summary":"Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket."},{"description":"Specifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the PGPORT environment variable or, if not set, to the port specified at compile time, usually 5432.","names":["-p port","--port= port"],"signature":"-p port --port= port","source_url":"/docs/18/app-pg-isready.html","summary":"Specifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the PGPORT environment variable or, if not set, to the port specified at compile time, usually 5432."},{"description":"Do not display status message. This is useful when scripting.","names":["-q","--quiet"],"signature":"-q --quiet","source_url":"/docs/18/app-pg-isready.html","summary":"Do not display status message. This is useful when scripting."},{"description":"The maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds.","names":["-t seconds","--timeout= seconds"],"signature":"-t seconds --timeout= seconds","source_url":"/docs/18/app-pg-isready.html","summary":"The maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds."},{"description":"Connect to the database as the user username instead of the default.","names":["-U username","--username= username"],"signature":"-U username --username= username","source_url":"/docs/18/app-pg-isready.html","summary":"Connect to the database as the user username instead of the default."},{"description":"Print the pg_isready version and exit.","names":["-V","--version"],"signature":"-V --version","source_url":"/docs/18/app-pg-isready.html","summary":"Print the pg_isready version and exit."},{"description":"Show help about pg_isready command line arguments, and exit.","names":["-?","--help"],"signature":"-? --help","source_url":"/docs/18/app-pg-isready.html","summary":"Show help about pg_isready command line arguments, and exit."}],"related":[],"release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[],"signature":"pg_isready [ connection-option ...] [ option ...]","sources":[{"anchor":"","file":"app-pg-isready.html","label":"18.6 English manual · app-pg-isready.html","sha256":"6e6424b4abc97251d901e24fef966ddfb326156d4ae8b6e2425829ee088909c8","url":"/docs/18/app-pg-isready.html"},{"anchor":"","file":"reference-client.html","label":"Client applications inventory","sha256":"68f726af77272fe73a827be2b7b5958d0f2239a6f8ed44264e9d42496bfa4fd0","url":"/docs/18/reference-client.html"}],"synopsis":["pg_isready [ connection-option ...] [ option ...]"],"tables":[{"columns":[{"key":"signature","label":"Option and arguments"},{"key":"summary","label":"Description"}],"key":"options","rows":[{"signature":{"text":"-d dbname --dbname= dbname","url":"/docs/18/app-pg-isready.html"},"summary":"Specifies the name of the database to connect to. The dbname can be a connection string . If so, connection string parameters will override any conflicting command line options."},{"signature":{"text":"-h hostname --host= hostname","url":"/docs/18/app-pg-isready.html"},"summary":"Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket."},{"signature":{"text":"-p port --port= port","url":"/docs/18/app-pg-isready.html"},"summary":"Specifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the PGPORT environment variable or, if not set, to the port specified at compile time, usually 5432."},{"signature":{"text":"-q --quiet","url":"/docs/18/app-pg-isready.html"},"summary":"Do not display status message. This is useful when scripting."},{"signature":{"text":"-t seconds --timeout= seconds","url":"/docs/18/app-pg-isready.html"},"summary":"The maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds."},{"signature":{"text":"-U username --username= username","url":"/docs/18/app-pg-isready.html"},"summary":"Connect to the database as the user username instead of the default."},{"signature":{"text":"-V --version","url":"/docs/18/app-pg-isready.html"},"summary":"Print the pg_isready version and exit."},{"signature":{"text":"-? --help","url":"/docs/18/app-pg-isready.html"},"summary":"Show help about pg_isready command line arguments, and exit."}],"title":"Documented options"}]},"ManualEvidence":{"manual_path":"app-pg-isready.html","release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"anchor":"","file":"app-pg-isready.html","label":"18.6 English manual · app-pg-isready.html","sha256":"6e6424b4abc97251d901e24fef966ddfb326156d4ae8b6e2425829ee088909c8","url":"/docs/18/app-pg-isready.html"},{"anchor":"","file":"reference-client.html","label":"Client applications inventory","sha256":"68f726af77272fe73a827be2b7b5958d0f2239a6f8ed44264e9d42496bfa4fd0","url":"/docs/18/reference-client.html"}]},"MeasuredEvidence":{}},"Text":{"Collection":"tool","Key":"pg-isready","SourceDatabase":"center","Version":"18","Locale":"en","Title":"pg_isready","Summary":"pg_isready — check the connection status of a PostgreSQL server","BodyHTML":"\u003cdiv\u003e\u003cdiv id=\"APP-PG-ISREADY\"\u003e\n\u003cdiv\u003e\u003c/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003e\u003cspan\u003e\u003cspan\u003epg_isready\u003c/span\u003e\u003c/span\u003e\u003c/h2\u003e\n\u003cp\u003epg_isready — check the connection status of a \u003cspan\u003ePostgreSQL\u003c/span\u003e server\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv\u003e\n\u003ch2\u003eSynopsis\u003c/h2\u003e\n\u003cdiv\u003e\n\u003cp id=\"id-1.9.4.16.4.1\"\u003e\u003ccode\u003epg_isready\u003c/code\u003e [\u003cem\u003e\u003ccode\u003econnection-option\u003c/code\u003e\u003c/em\u003e...] [\u003cem\u003e\u003ccode\u003eoption\u003c/code\u003e\u003c/em\u003e...]\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv id=\"APP-PG-ISREADY-DESCRIPTION\"\u003e\n\u003ch2\u003eDescription\u003c/h2\u003e\n\u003cp\u003e\u003cspan\u003epg_isready\u003c/span\u003e is a utility for checking the connection status of a \u003cspan\u003ePostgreSQL\u003c/span\u003e database server. The exit status specifies the result of the connection check.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"APP-PG-ISREADY-OPTIONS\"\u003e\n\u003ch2\u003eOptions\u003c/h2\u003e\n\u003cdiv\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-d \u003cem\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--dbname=\u003cem\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the name of the database to connect to. The \u003cem\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e can be a \u003ca href=\"/docs/18/libpq-connect.html#LIBPQ-CONNSTRING\" rel=\"nofollow\"\u003econnection string\u003c/a\u003e. If so, connection string parameters will override any conflicting command line options.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-h \u003cem\u003e\u003ccode\u003ehostname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--host=\u003cem\u003e\u003ccode\u003ehostname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-p \u003cem\u003e\u003ccode\u003eport\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--port=\u003cem\u003e\u003ccode\u003eport\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the \u003ccode\u003ePGPORT\u003c/code\u003e environment variable or, if not set, to the port specified at compile time, usually 5432.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-q\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--quiet\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDo not display status message. This is useful when scripting.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-t \u003cem\u003e\u003ccode\u003eseconds\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--timeout=\u003cem\u003e\u003ccode\u003eseconds\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eThe maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-U \u003cem\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--username=\u003cem\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eConnect to the database as the user \u003cem\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e instead of the default.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-V\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--version\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003ePrint the \u003cspan\u003epg_isready\u003c/span\u003e version and exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan\u003e\u003ccode\u003e-?\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan\u003e\u003ccode\u003e--help\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eShow help about \u003cspan\u003epg_isready\u003c/span\u003e command line arguments, and exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv id=\"id-1.9.4.16.7\"\u003e\n\u003ch2\u003eExit Status\u003c/h2\u003e\n\u003cp\u003e\u003cspan\u003epg_isready\u003c/span\u003e returns \u003ccode\u003e0\u003c/code\u003e to the shell if the server is accepting connections normally, \u003ccode\u003e1\u003c/code\u003e if the server is rejecting connections (for example during startup), \u003ccode\u003e2\u003c/code\u003e if there was no response to the connection attempt, and \u003ccode\u003e3\u003c/code\u003e if no attempt was made (for example due to invalid parameters).\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"id-1.9.4.16.8\"\u003e\n\u003ch2\u003eEnvironment\u003c/h2\u003e\n\u003cp\u003e\u003ccode\u003epg_isready\u003c/code\u003e, like most other \u003cspan\u003ePostgreSQL\u003c/span\u003e utilities, also uses the environment variables supported by \u003cspan\u003elibpq\u003c/span\u003e (see \u003ca href=\"/docs/18/libpq-envars.html\" rel=\"nofollow\"\u003eSection 32.15\u003c/a\u003e).\u003c/p\u003e\n\u003cp\u003eThe environment variable \u003ccode\u003ePG_COLOR\u003c/code\u003e specifies whether to use color in diagnostic messages. Possible values are \u003ccode\u003ealways\u003c/code\u003e, \u003ccode\u003eauto\u003c/code\u003e and \u003ccode\u003enever\u003c/code\u003e.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"APP-PG-ISREADY-NOTES\"\u003e\n\u003ch2\u003eNotes\u003c/h2\u003e\n\u003cp\u003eIt is not necessary to supply correct user name, password, or database name values to obtain the server status; however, if incorrect values are provided, the server will log a failed connection attempt.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv id=\"APP-PG-ISREADY-EXAMPLES\"\u003e\n\u003ch2\u003eExamples\u003c/h2\u003e\n\u003cp\u003eStandard Usage:\u003c/p\u003e\n\u003cpre\u003e\u003ccode\u003e$\u003c/code\u003e \u003cstrong\u003e\u003ccode\u003epg_isready\u003c/code\u003e\u003c/strong\u003e\n\u003ccode\u003e/tmp:5432 - accepting connections\u003c/code\u003e\n\u003ccode\u003e$\u003c/code\u003e \u003cstrong\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode\u003e0\u003c/code\u003e\n\u003c/pre\u003e\n\u003cp\u003eRunning with connection parameters to a \u003cspan\u003ePostgreSQL\u003c/span\u003e cluster in startup:\u003c/p\u003e\n\u003cpre\u003e\u003ccode\u003e$ \u003c/code\u003e\u003cstrong\u003e\u003ccode\u003epg_isready -h localhost -p 5433\u003c/code\u003e\u003c/strong\u003e\n\u003ccode\u003elocalhost:5433 - rejecting connections\u003c/code\u003e\n\u003ccode\u003e$\u003c/code\u003e \u003cstrong\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode\u003e1\u003c/code\u003e\n\u003c/pre\u003e\n\u003cp\u003eRunning with connection parameters to a non-responsive \u003cspan\u003ePostgreSQL\u003c/span\u003e cluster:\u003c/p\u003e\n\u003cpre\u003e\u003ccode\u003e$ \u003c/code\u003e\u003cstrong\u003e\u003ccode\u003epg_isready -h someremotehost\u003c/code\u003e\u003c/strong\u003e\n\u003ccode\u003esomeremotehost:5432 - no response\u003c/code\u003e\n\u003ccode\u003e$\u003c/code\u003e \u003cstrong\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode\u003e2\u003c/code\u003e\n\u003c/pre\u003e\n\u003c/div\u003e\n\u003c/div\u003e\u003c/div\u003e","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","ContentHash":"7f7fbb6f0789376c076b498d049276bc63c0ad9595a76498fdcd2e10f738e8f4","Payload":{"description":["pg_isready — check the connection status of a PostgreSQL server"],"manual_html":"\u003cdiv\u003e\u003cdiv class=\"refentry\" id=\"APP-PG-ISREADY\"\u003e\n\u003cdiv class=\"titlepage\"\u003e\u003c/div\u003e\n\u003cdiv class=\"refnamediv\"\u003e\n\u003ch2\u003e\u003cspan class=\"refentrytitle\"\u003e\u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e\u003c/span\u003e\u003c/h2\u003e\n\u003cp\u003epg_isready — check the connection status of a \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e server\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsynopsisdiv\"\u003e\n\u003ch2\u003eSynopsis\u003c/h2\u003e\n\u003cdiv class=\"cmdsynopsis\"\u003e\n\u003cp id=\"id-1.9.4.16.4.1\"\u003e\u003ccode class=\"command\"\u003epg_isready\u003c/code\u003e [\u003cem class=\"replaceable\"\u003e\u003ccode\u003econnection-option\u003c/code\u003e\u003c/em\u003e...] [\u003cem class=\"replaceable\"\u003e\u003ccode\u003eoption\u003c/code\u003e\u003c/em\u003e...]\u003c/p\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-DESCRIPTION\"\u003e\n\u003ch2\u003eDescription\u003c/h2\u003e\n\u003cp\u003e\u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e is a utility for checking the connection status of a \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e database server. The exit status specifies the result of the connection check.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-OPTIONS\"\u003e\n\u003ch2\u003eOptions\u003c/h2\u003e\n\u003cdiv class=\"variablelist\"\u003e\n\u003cdl class=\"variablelist\"\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-d \u003cem class=\"replaceable\"\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--dbname=\u003cem class=\"replaceable\"\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the name of the database to connect to. The \u003cem class=\"replaceable\"\u003e\u003ccode\u003edbname\u003c/code\u003e\u003c/em\u003e can be a \u003ca class=\"link\" href=\"/docs/18/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1. Connection Strings\"\u003econnection string\u003c/a\u003e. If so, connection string parameters will override any conflicting command line options.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-h \u003cem class=\"replaceable\"\u003e\u003ccode\u003ehostname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--host=\u003cem class=\"replaceable\"\u003e\u003ccode\u003ehostname\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-p \u003cem class=\"replaceable\"\u003e\u003ccode\u003eport\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--port=\u003cem class=\"replaceable\"\u003e\u003ccode\u003eport\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eSpecifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the \u003ccode class=\"envar\"\u003ePGPORT\u003c/code\u003e environment variable or, if not set, to the port specified at compile time, usually 5432.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-q\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--quiet\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eDo not display status message. This is useful when scripting.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-t \u003cem class=\"replaceable\"\u003e\u003ccode\u003eseconds\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--timeout=\u003cem class=\"replaceable\"\u003e\u003ccode\u003eseconds\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eThe maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-U \u003cem class=\"replaceable\"\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--username=\u003cem class=\"replaceable\"\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eConnect to the database as the user \u003cem class=\"replaceable\"\u003e\u003ccode\u003eusername\u003c/code\u003e\u003c/em\u003e instead of the default.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-V\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--version\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003ePrint the \u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e version and exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e-?\u003c/code\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"option\"\u003e--help\u003c/code\u003e\u003c/span\u003e\u003c/dt\u003e\n\u003cdd\u003e\n\u003cp\u003eShow help about \u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e command line arguments, and exit.\u003c/p\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.4.16.7\"\u003e\n\u003ch2\u003eExit Status\u003c/h2\u003e\n\u003cp\u003e\u003cspan class=\"application\"\u003epg_isready\u003c/span\u003e returns \u003ccode class=\"literal\"\u003e0\u003c/code\u003e to the shell if the server is accepting connections normally, \u003ccode class=\"literal\"\u003e1\u003c/code\u003e if the server is rejecting connections (for example during startup), \u003ccode class=\"literal\"\u003e2\u003c/code\u003e if there was no response to the connection attempt, and \u003ccode class=\"literal\"\u003e3\u003c/code\u003e if no attempt was made (for example due to invalid parameters).\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"id-1.9.4.16.8\"\u003e\n\u003ch2\u003eEnvironment\u003c/h2\u003e\n\u003cp\u003e\u003ccode class=\"command\"\u003epg_isready\u003c/code\u003e, like most other \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e utilities, also uses the environment variables supported by \u003cspan class=\"application\"\u003elibpq\u003c/span\u003e (see \u003ca class=\"xref\" href=\"/docs/18/libpq-envars.html\" title=\"32.15. Environment Variables\"\u003eSection 32.15\u003c/a\u003e).\u003c/p\u003e\n\u003cp\u003eThe environment variable \u003ccode class=\"envar\"\u003ePG_COLOR\u003c/code\u003e specifies whether to use color in diagnostic messages. Possible values are \u003ccode class=\"literal\"\u003ealways\u003c/code\u003e, \u003ccode class=\"literal\"\u003eauto\u003c/code\u003e and \u003ccode class=\"literal\"\u003enever\u003c/code\u003e.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-NOTES\"\u003e\n\u003ch2\u003eNotes\u003c/h2\u003e\n\u003cp\u003eIt is not necessary to supply correct user name, password, or database name values to obtain the server status; however, if incorrect values are provided, the server will log a failed connection attempt.\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv class=\"refsect1\" id=\"APP-PG-ISREADY-EXAMPLES\"\u003e\n\u003ch2\u003eExamples\u003c/h2\u003e\n\u003cp\u003eStandard Usage:\u003c/p\u003e\n\u003cpre class=\"screen\"\u003e\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003epg_isready\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e/tmp:5432 - accepting connections\u003c/code\u003e\n\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e0\u003c/code\u003e\n\u003c/pre\u003e\n\u003cp\u003eRunning with connection parameters to a \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e cluster in startup:\u003c/p\u003e\n\u003cpre class=\"screen\"\u003e\u003ccode class=\"prompt\"\u003e$ \u003c/code\u003e\u003cstrong class=\"userinput\"\u003e\u003ccode\u003epg_isready -h localhost -p 5433\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003elocalhost:5433 - rejecting connections\u003c/code\u003e\n\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e1\u003c/code\u003e\n\u003c/pre\u003e\n\u003cp\u003eRunning with connection parameters to a non-responsive \u003cspan class=\"productname\"\u003ePostgreSQL\u003c/span\u003e cluster:\u003c/p\u003e\n\u003cpre class=\"screen\"\u003e\u003ccode class=\"prompt\"\u003e$ \u003c/code\u003e\u003cstrong class=\"userinput\"\u003e\u003ccode\u003epg_isready -h someremotehost\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003esomeremotehost:5432 - no response\u003c/code\u003e\n\u003ccode class=\"prompt\"\u003e$\u003c/code\u003e \u003cstrong class=\"userinput\"\u003e\u003ccode\u003eecho $?\u003c/code\u003e\u003c/strong\u003e\n\u003ccode class=\"computeroutput\"\u003e2\u003c/code\u003e\n\u003c/pre\u003e\n\u003c/div\u003e\n\u003c/div\u003e\u003c/div\u003e","related":[],"sections":[],"tables":[{"columns":[{"key":"signature","label":"Option and arguments"},{"key":"summary","label":"Description"}],"key":"options","rows":[{"signature":{"text":"-d dbname --dbname= dbname","url":"/docs/18/app-pg-isready.html"},"summary":"Specifies the name of the database to connect to. The dbname can be a connection string . If so, connection string parameters will override any conflicting command line options."},{"signature":{"text":"-h hostname --host= hostname","url":"/docs/18/app-pg-isready.html"},"summary":"Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix-domain socket."},{"signature":{"text":"-p port --port= port","url":"/docs/18/app-pg-isready.html"},"summary":"Specifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Defaults to the value of the PGPORT environment variable or, if not set, to the port specified at compile time, usually 5432."},{"signature":{"text":"-q --quiet","url":"/docs/18/app-pg-isready.html"},"summary":"Do not display status message. This is useful when scripting."},{"signature":{"text":"-t seconds --timeout= seconds","url":"/docs/18/app-pg-isready.html"},"summary":"The maximum number of seconds to wait when attempting connection before returning that the server is not responding. Setting to 0 disables. The default is 3 seconds."},{"signature":{"text":"-U username --username= username","url":"/docs/18/app-pg-isready.html"},"summary":"Connect to the database as the user username instead of the default."},{"signature":{"text":"-V --version","url":"/docs/18/app-pg-isready.html"},"summary":"Print the pg_isready version and exit."},{"signature":{"text":"-? --help","url":"/docs/18/app-pg-isready.html"},"summary":"Show help about pg_isready command line arguments, and exit."}],"title":"Documented options"}]}},"RequestedLocale":"zh-Hans","Fallback":true,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}