1、pg_stat_database 指标含义 通过pg_stat_database我们可以大致的了解一个数据库的历史运行情况,比较常见的一个问题定位有: 当tup_returned值远大于tup_fetched时,说明该数据库下存在较多全表扫描SQL,结合pg_stat_statments来定位具体慢SQL或者结合pg_stat_user_tables来定位全表扫描相关表 当tup_updated的数值比...
1. pg_stat_database 通过pg_stat_database可以大概了解数据库的历史情况。 select datname as 数据库名, numbackends as 连接数, xact_commit as 事务提交总量, xact_rollback as 事务回滚总量, tup_returned as 全表扫描行数, tup_fetched as 索引返回行数, deadlocks as 死锁数量 from pg_stat_database...
1、pg_stat_database 指标含义 通过pg_stat_database我们可以大致的了解一个数据库的历史运行情况,比较常见的一个问题定位有: 当tup_returned值远大于tup_fetched时,说明该数据库下存在较多全表扫描SQL,结合pg_stat_statments来定位具体慢SQL或者结合pg_stat_user_tables来定位全表扫描相关表 当tup_updated的数值比...
PG_STAT_DATABASE PG_STAT_DATABASE_CONFLICTS PG_STAT_REPLICATION PG_STAT_SYS_INDEXES PG_STAT_SYS_TABLES PG_STAT_USER_FUNCTIONS PG_STAT_USER_INDEXES PG_STAT_USER_TABLES PG_STAT_XACT_ALL_TABLES PG_STAT_XACT_SYS_TABLES PG_STAT_XACT_USER_FUNCTIONS PG_STAT_XACT_USER_TABLES ...
tup_fetched bigint 通过数据库查询抓取的行数。 tup_inserted bigint 通过数据库查询插入的行数。 tup_updated bigint 通过数据库查询更新的行数。 tup_deleted bigint 通过数据库查询删除的行数。 conflicts bigint 由于数据库恢复冲突取消的查询数量(只在备用服务器发生的冲突)。请参见PG_STAT_DATABASE_CONFLIC...
PG运行过程中会自动收集大量的统计信息,统计信息表名以pg_stat和pg_statio开头 ###数据库级统计信息 postgres@postgres:\d pg_stat_database View "pg_catalog.pg_stat_database" Column
I found the pg_stat_all_tables view and n_tup_ins/upd/del columns. These will tell me how many rows have been added to a table, but I can't find information about these values anywhere. I know they are all really collected from function pg_stat_get_tuples_inserted(c.oid) AS n...
PG的很多性能数据可以通过查询pg_stat_或pg_statio_开头的系统表获取。 比如: postgres=#\x Expanded display is on. postgres=#select*from pg_stat_database where datname='postgres'; -[RECORD1]--+--- datid|12896 datname|postgres numbackends|...
tup_updated, tup_deleted, temp_files, temp_bytes, stats_reset) SELECT snapshot_tstamp, xact_commit, xact_rollback, blks_read, blks_hit, tup_returned, tup_fetched, tup_inserted, tup_updated, tup_deleted, temp_files, temp_bytes, stats_reset FROM pg_stat_database WHERE datname = current...
tup_returned, tup_fetched, tup_inserted, tup_updated, tup_deleted, temp_files, temp_bytes, stats_reset, pg_postmaster_start_time() FROM pg_stat_database WHERE datname = current_database(); $$ LANGUAGE SQL;-- Snapshots CREATE OR REPLACE FUNCTION @extschema@.snapshot() ...