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If the WAL summarizer has never run since the instance was started, then summarized_tli and summarized_lsn will be 0 and 0/0 respectively; otherwise, they will be the TLI and ending LSN of the last WAL summary file written to disk. If the WAL summarizer is currently running, pending_lsn will be the ending LSN of the last record that it has consumed, which must always be greater than or equal to summarized_lsn; if the WAL summarizer is not running, it will be equal to summarized_lsn. summarizer_pid is the PID of the WAL summarizer process, if it is running, and otherwise NULL.","description_html":"Returns information about the progress of the WAL summarizer. If the WAL summarizer has never run since the instance was started, then \u003ccode class=\"literal\"\u003esummarized_tli\u003c/code\u003e and \u003ccode class=\"literal\"\u003esummarized_lsn\u003c/code\u003e will be \u003ccode class=\"literal\"\u003e0\u003c/code\u003e and \u003ccode class=\"literal\"\u003e0/0\u003c/code\u003e respectively; otherwise, they will be the TLI and ending LSN of the last WAL summary file written to disk. If the WAL summarizer is currently running, \u003ccode class=\"literal\"\u003epending_lsn\u003c/code\u003e will be the ending LSN of the last record that it has consumed, which must always be greater than or equal to \u003ccode class=\"literal\"\u003esummarized_lsn\u003c/code\u003e; if the WAL summarizer is not running, it will be equal to \u003ccode class=\"literal\"\u003esummarized_lsn\u003c/code\u003e. \u003ccode class=\"literal\"\u003esummarizer_pid\u003c/code\u003e is the PID of the WAL summarizer process, if it is running, and otherwise NULL.","description_zh":"返回有关 WAL 汇总器进度的信息。如果自实例启动以来 WAL 汇总器从未运行过，则 summarized_tli 和 summarized_lsn 将分别为 0 和 0/0；否则，它们将是最近写入磁盘的 WAL 汇总文件的 TLI 和结束 LSN。如果 WAL 汇总器当前正在运行，pending_lsn 将是它已消费的最后一条记录的结束 LSN，该值必定始终大于或等于 summarized_lsn；如果 WAL 汇总器未在运行，则它将等于 summarized_lsn。summarizer_pid 是 WAL 汇总器进程的 PID；如果它正在运行则返回该 PID，否则为 NULL。","description_zh_html":"返回有关 WAL 汇总器进度的信息。如果自实例启动以来 WAL 汇总器从未运行过，则 \u003ccode class=\"literal\"\u003esummarized_tli\u003c/code\u003e 和 \u003ccode class=\"literal\"\u003esummarized_lsn\u003c/code\u003e 将分别为 \u003ccode class=\"literal\"\u003e0\u003c/code\u003e 和 \u003ccode class=\"literal\"\u003e0/0\u003c/code\u003e；否则，它们将是最近写入磁盘的 WAL 汇总文件的 TLI 和结束 LSN。如果 WAL 汇总器当前正在运行，\u003ccode class=\"literal\"\u003epending_lsn\u003c/code\u003e 将是它已消费的最后一条记录的结束 LSN，该值必定始终大于或等于 \u003ccode class=\"literal\"\u003esummarized_lsn\u003c/code\u003e；如果 WAL 汇总器未在运行，则它将等于 \u003ccode class=\"literal\"\u003esummarized_lsn\u003c/code\u003e。\u003ccode class=\"literal\"\u003esummarizer_pid\u003c/code\u003e 是 WAL 汇总器进程的 PID；如果它正在运行则返回该 PID，否则为 NULL。","examples":[],"html":"\u003ccode class=\"function\"\u003epg_get_wal_summarizer_state\u003c/code\u003e () → \u003ccode class=\"returnvalue\"\u003erecord\u003c/code\u003e ( \u003cem class=\"parameter\"\u003e\u003ccode\u003esummarized_tli\u003c/code\u003e\u003c/em\u003e \u003ccode class=\"type\"\u003ebigint\u003c/code\u003e, \u003cem class=\"parameter\"\u003e\u003ccode\u003esummarized_lsn\u003c/code\u003e\u003c/em\u003e \u003ccode class=\"type\"\u003epg_lsn\u003c/code\u003e, \u003cem class=\"parameter\"\u003e\u003ccode\u003epending_lsn\u003c/code\u003e\u003c/em\u003e \u003ccode class=\"type\"\u003epg_lsn\u003c/code\u003e, \u003cem class=\"parameter\"\u003e\u003ccode\u003esummarizer_pid\u003c/code\u003e\u003c/em\u003e \u003ccode class=\"type\"\u003eint\u003c/code\u003e )","returns":"record","text":"pg_get_wal_summarizer_state () → record ( summarized_tli bigint, summarized_lsn pg_lsn, pending_lsn pg_lsn, summarizer_pid int )","zh_from":"same-version-manual"}}],"Spellings":null,"SQLState":null,"Evidence":null}