PG_STAT_DATABASE视图将包含集群中每个数据库的数据库统计信息。 表1 PG_STAT_DATABASE字段 名称 类型 描述 datid oid 数据库的OID。 datname name 这个数据库的名称。 numbackends integer 当前连接到该数据库的后端数。 这是在返回一个反映目前状态值的视图中唯一的列;自上次重置所有其他列返回累积值。
PG_SETTINGS PG_SHADOW PG_SHARED_MEMORY_DETAIL PG_STAT_ACTIVITY PG_STAT_ALL_INDEXES PG_STAT_ALL_TABLES PG_STAT_BAD_BLOCK PG_STAT_BGWRITER PG_STAT_DATABASE PG_STAT_DATABASE_CONFLICTS PG_STAT_REPLICATION PG_STAT_SYS_INDEXES PG_STAT_SYS_TABLES PG_STAT_USER_FUNCTIONS PG_...
postgres pg_stat_database视图,pg_stat_database视图列类型描述datid(gp含有)oid数据库的OIDdatname(gp)name这个数据库的名字numbackends(gp)integer当前连接到该数据库的后端数。这是在返回一个反映目前状态值的视图中唯一的列;自上次重置所有其他列返回累积值。x
--听着有占绕,比如上例tup_fetched差值为1,说明count(*)之后数据库呈现给用户的行数为1,tup_returned的差值为24,说明数据库要返回count(*)的值要查询到满 postgres=# select datname,pg_size_pretty(temp_bytes),temp_files,tup_returned,tup_fetched from pg_stat_database where datname = 'postgres'; ...
pg_stat_statements模块提供追踪服务器所执行的所有SQL语句的执行统计信息。 该模块必须通过在postgresql.conf的shared_preload_libraries中增加pg_stat_statements来载入,因为它需要额外的共享内存。这意味着增加或移除该模块需要一次服务器重启。 当pg_stat_statements被载入时,它会跟踪该服务器的所有数据库的统计信息。该...
UTC [24] LOG: database system was shut down at 2020-11-02 10:16:05 UTC ... UTC [1] LOG: database system is ready to accept connections ... UTC [28] WARNING: could not open statistics file "pg_stat_tmp/global.stat": Stale file handle Here the volume is mount...
I'm attempting to use pg_stat_statements to optimise my queries but ran into an unexpected roadblock. SELECT total_plan_time + total_exec_time as total_time, query FROM pg_stat_statements ORDER BY total_time DESC LIMIT 10; results in ERROR: invalid byte sequence for encod...
I'm confused about the write_location and flush_location of pg_stat_replication view . The document say, write_location stands for last transaction log position written to disk by this standby server , flush_location stands for Last transaction log position flushed to disk by this standby...
pg_exporter_last_scrape_duration_seconds:pg_exporter上次抓取持续时间秒[lw] pg_exporter_last_scrape_error:pg_exporter上次抓取错误[lw] pg_exporter_scrapes_total:pg_exporter采集总数[lw] pg_locks_count:锁计数[lw] pg_replication_slots_active:复制槽活动[lw] pg_replication_slots_pg_wal_lsn_diff:[lw...
The database monitoring information thatpg_stat_statementsprovides is invaluable when you need it. However, it's most helpful when the data shows trends and patterns over time to visualize the true state of your database when problems arise. ...