{"Entry":{"collection":"relopts","key":"table-autovacuum-multixact-freeze-table-age","name":"autovacuum_multixact_freeze_table_age","aliases":["table.autovacuum_multixact_freeze_table_age"],"metadata":{"aliases":["table.autovacuum_multixact_freeze_table_age"],"category":"Tables and materialized views","content_hash":"bc64c7d5cfcde0b5cbb962ee8f8c04f80068ad3fd10338622052446832bedf05","imported_at":"2026-09-30T17:44:22.206898+08:00","name":"autovacuum_multixact_freeze_table_age","name_zh":"autovacuum_multixact_freeze_table_age","slug":"table-autovacuum-multixact-freeze-table-age","summary":"Per-table value for vacuum_multixact_freeze_table_age parameter."}},"Definition":{"Collection":"relopts","Key":"table-autovacuum-multixact-freeze-table-age","SourceDatabase":"center","Version":"18","SourceTable":"relopt","SourceKey":"table-autovacuum-multixact-freeze-table-age","SourceRevision":"eb6c2292fdf28e1b4635ab478eec3919411cdf4a6c07553387870e26201f3744","Facts":{"description":["Per-table value for vacuum_multixact_freeze_table_age parameter."],"facts":[{"label":"Applies to","value":"Tables and materialized views"},{"label":"Value type","value":"integer"}],"related":[{"label":"Global parameter vacuum_multixact_freeze_table_age","url":"/wiki/guc/vacuum_multixact_freeze_table_age/?v=18"},{"label":"CREATE TABLE","url":"/wiki/sql/create-table/?v=18"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"Local English manual 18.6","revision":"eb6c2292fdf28e1b4635ab478eec3919411cdf4a6c07553387870e26201f3744"},"sections":[{"paragraphs":["This relation-level setting applies to the table or materialized view. Any corresponding global parameter has a separate entry."],"title":"Scope"},{"paragraphs":["The WITH clause can specify storage parameters for tables, and for indexes associated with a UNIQUE , PRIMARY KEY , or EXCLUDE constraint. Storage parameters for indexes are documented in CREATE INDEX . The storage parameters currently available for tables are listed below. For many of these parameters, as shown, there is an additional parameter with the same name prefixed with toast. , which controls the behavior of the table's secondary TOAST table, if any (see Section 66.2 for more information about TOAST). If a table parameter value is set and the equivalent toast. parameter is not, the TOAST table will use the table's parameter value. Specifying these parameters for partitioned tables is not supported, but you may specify them for individual leaf partitions."],"title":"Common table storage rules"},{"paragraphs":["This clause specifies optional storage parameters for the new materialized view; see Storage Parameters in the CREATE TABLE documentation for more information. All parameters supported for CREATE TABLE are also supported for CREATE MATERIALIZED VIEW . See CREATE TABLE for more information."],"title":"Materialized views"},{"paragraphs":["The following same-version GUC definition explains its purpose and units. Global defaults and activation rules describe the GUC; the relation-option override rules remain those above.","VACUUM performs an aggressive scan if the table's pg_class . relminmxid field has reached the age specified by this setting. An aggressive scan differs from a regular VACUUM in that it visits every page that might contain unfrozen XIDs or MXIDs, not just those that might contain dead tuples. The default is 150 million multixacts. Although users can set this value anywhere from zero to two billion, VACUUM will silently limit the effective value to 95% of autovacuum_multixact_freeze_max_age , so that a periodic manual VACUUM has a chance to run before an anti-wraparound is launched for the table. For more information see Section 24.1.5.1 ."],"title":"Related global parameter: vacuum_multixact_freeze_table_age"}],"signature":"WITH (autovacuum_multixact_freeze_table_age = value)","sources":[{"label":"PostgreSQL 18 English manual","path":"sql-createtable.html","sha256":"b4d703391fe1102d0e02bd6769bef928513eb7a5542f38f7448fc77fe69e0d5b","url":"/docs/18/sql-createtable.html#RELOPTION-AUTOVACUUM-MULTIXACT-FREEZE-TABLE-AGE"},{"label":"Related global parameter: vacuum_multixact_freeze_table_age","path":"runtime-config-vacuum.html","sha256":"7047f1fa9138b97f1812532f8a905fa7479451dfd64655e029a7d387b20b22e4","url":"/docs/18/runtime-config-vacuum.html#GUC-VACUUM-MULTIXACT-FREEZE-TABLE-AGE"},{"label":"PostgreSQL 18 English manual","path":"sql-creatematerializedview.html","sha256":"bd8a6710c9f133afee191eb0ec345ef8c54bb54db2242621d8cb683c783a8b18","url":"/docs/18/sql-creatematerializedview.html"}]},"ManualEvidence":{"release":{"channel":"stable","label":"18.6","major":"18","ref":"Local English manual 18.6","revision":"eb6c2292fdf28e1b4635ab478eec3919411cdf4a6c07553387870e26201f3744"},"sources":[{"label":"PostgreSQL 18 English manual","path":"sql-createtable.html","sha256":"b4d703391fe1102d0e02bd6769bef928513eb7a5542f38f7448fc77fe69e0d5b","url":"/docs/18/sql-createtable.html#RELOPTION-AUTOVACUUM-MULTIXACT-FREEZE-TABLE-AGE"},{"label":"Related global parameter: vacuum_multixact_freeze_table_age","path":"runtime-config-vacuum.html","sha256":"7047f1fa9138b97f1812532f8a905fa7479451dfd64655e029a7d387b20b22e4","url":"/docs/18/runtime-config-vacuum.html#GUC-VACUUM-MULTIXACT-FREEZE-TABLE-AGE"},{"label":"PostgreSQL 18 English manual","path":"sql-creatematerializedview.html","sha256":"bd8a6710c9f133afee191eb0ec345ef8c54bb54db2242621d8cb683c783a8b18","url":"/docs/18/sql-creatematerializedview.html"}]},"MeasuredEvidence":{}},"Text":{"Collection":"relopts","Key":"table-autovacuum-multixact-freeze-table-age","SourceDatabase":"center","Version":"18","Locale":"en","Title":"autovacuum_multixact_freeze_table_age","Summary":"Per-table value for vacuum_multixact_freeze_table_age parameter.","BodyHTML":"\u003cp\u003ePer-table value for vacuum_multixact_freeze_table_age parameter.\u003c/p\u003e","SourceRevision":"eb6c2292fdf28e1b4635ab478eec3919411cdf4a6c07553387870e26201f3744","ContentHash":"7eb5f23fbe3b0a39b29a9c6e480398d6329fcdbcc99df6d381c455945eec7dd1","Payload":{"description":["Per-table value for vacuum_multixact_freeze_table_age parameter."],"related":[{"label":"Global parameter vacuum_multixact_freeze_table_age","url":"/wiki/guc/vacuum_multixact_freeze_table_age/?v=18"},{"label":"CREATE TABLE","url":"/wiki/sql/create-table/?v=18"}],"sections":[{"paragraphs":["This relation-level setting applies to the table or materialized view. Any corresponding global parameter has a separate entry."],"title":"Scope"},{"paragraphs":["The WITH clause can specify storage parameters for tables, and for indexes associated with a UNIQUE , PRIMARY KEY , or EXCLUDE constraint. Storage parameters for indexes are documented in CREATE INDEX . The storage parameters currently available for tables are listed below. For many of these parameters, as shown, there is an additional parameter with the same name prefixed with toast. , which controls the behavior of the table's secondary TOAST table, if any (see Section 66.2 for more information about TOAST). If a table parameter value is set and the equivalent toast. parameter is not, the TOAST table will use the table's parameter value. Specifying these parameters for partitioned tables is not supported, but you may specify them for individual leaf partitions."],"title":"Common table storage rules"},{"paragraphs":["This clause specifies optional storage parameters for the new materialized view; see Storage Parameters in the CREATE TABLE documentation for more information. All parameters supported for CREATE TABLE are also supported for CREATE MATERIALIZED VIEW . See CREATE TABLE for more information."],"title":"Materialized views"},{"paragraphs":["The following same-version GUC definition explains its purpose and units. Global defaults and activation rules describe the GUC; the relation-option override rules remain those above.","VACUUM performs an aggressive scan if the table's pg_class . relminmxid field has reached the age specified by this setting. An aggressive scan differs from a regular VACUUM in that it visits every page that might contain unfrozen XIDs or MXIDs, not just those that might contain dead tuples. The default is 150 million multixacts. Although users can set this value anywhere from zero to two billion, VACUUM will silently limit the effective value to 95% of autovacuum_multixact_freeze_max_age , so that a periodic manual VACUUM has a chance to run before an anti-wraparound is launched for the table. For more information see Section 24.1.5.1 ."],"title":"Related global parameter: vacuum_multixact_freeze_table_age"}]}},"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}