select * from pg_stat_user_tables where n_live_tup > 100000 and seq_scan > 0 order by seq_tup_read desc limit 10; 9、查询读取buffer最多的5个SQL select * from pg_stat_statements order by shared_blks_hit+shared_blks_read desc limit 5; 10、获取数据库当前的回滚事务数以及死锁数 select...
and pid<>pg_backend_pid() and query ilike'select%'order by query_start ; 2. 超过10s的查询会被干掉 selectpg_terminate_backend(pid) From pg_stat_activitywherequery_start<=now()- interval'10 sec'and state notin('idle') and pid<>pg_backend_pid() and query ilike'select%'order by query...
id=100 union select null,( select table_name from user_tables where rownum=1),null,null,null,null,null,null,null,null,null from dual 获取第二个表 http://192.168.1.210:8080/SqlInject/SqlTest.jsp?id=100 union select null,( select table_name from user_tables where rownum=1 and table_nam...
postgres@[local:/tmp]:2004=#34126 show wal_log_hints ; wal_log_hints--- on (1 row) postgres@[local:/tmp]:2004=#34126 select context from pg_settings where name = 'wal_log_hints'; context--- postmaster (1 row) postgres@[local:/tmp]:2004=#34126 alter system set wal_log_hints=...
From pg_stat_activity where query_start<=now()- interval'10 sec' and state not in ('idle') and pid<>pg_backend_pid() and query ilike 'select%' order by query_start ; 1. 2. 3. 4. 5. 6. 3. 查询现在的sql SELECT pid,
在数据库集群中，有3个配置文件，分别是：postgresql.conf，pg_hba.conf和pg_ident.conf。其中postgresql...
Connected to databasedepeszwith usertestand got: $select*frompg_stat_activity ; datid │ datname │ pid │ leader_pid │ usesysid │ usename │ application_name │ client_addr │ client_hostname │ client_port │ backend_start │ xact_start │ query_start │ state_change │ wait_event...
System views added to pgdoc.link Checking logs forpgdoc.linkI noticed that some people where searching for system views, likepg_stat_activity, orpg_stat_all_tables in Pg 9.3. Now, these will work. This increased total number of known keywords from 1840 to 1883. Not much, but it's a ...
userattr(1) users(1) users(1B) uucp(1C) uudecode(1C) uuencode(1C) uuglist(1C) uulog(1C) uuname(1C) uupick(1C) uustat(1C) uuto(1C) uux(1C) uxterm(1) vacation(1) val(1) valdate(1) valgid(1) valint(1) valpath(1) valrange(1) valstr(1) valtime(1) valuid(1...
在数据库的日常使用中,难免会遇到慢 SQL,遇到慢 SQL 本身并不可怕,困难之处在于如何识别慢 SQL 并对其优化,使它不至于拖慢整个系统的性能,避免危害到日常业务的正常进行。 上期我们讲了索引原因、系统配置和资源竞争导致的慢 SQL,今天我们继续分析和总结。