max_connections 通常,max_connections的目的是防止max_connections * work_mem超出了实际内存大小。 比如,如果将work_mem设置为实际内存的2%大小,则在极端情况下,如果有50个查询都有排序要求,而且都使 用2%的内存,则会导致swap的产生,系统性能就会大大降低。 当然,如果有4G的内存,同时出现50个如此大的查询的几率应...
4. Terminate all connections to source PG10 DB Why:Ensures no connections to PG10 DB from application(s). 5. Check replication lag Why:If replication is 0, it means both PG10 and PG13 DB are in sync. SELECT now() AS CURRENT_TIME, slot_name, active, active_pid, pg_size_pretty(pg...
3.PG查看当前进程 #查看连接数和详情select *from pg_stat_activity;#查看最大连接数show max_connections; 4.批量删除空闲进程 #使用PG账户在数据库客户端上删除SELECT pg_terminate_backend(p.pid) FROM ( SELECT pid FROM pg_stat_activity WHERE pid <> pg_backend_pid() AND state ='idle' UNION ALL ...
selectpg_terminate_backend(pid) from pg_stat_activity where usename='admin'; -- 杀死admin账户的当前连接(我这里业务账号用的是admin) 10、查询最大连接数 1 show max_connections; 11、导出数据到csv文件 1 copy (select* fromtest) to'/data/test.csv'with csv header; 12、查询最消耗CPU的sql语句 ...
grant all privileges on database ambari to ambari;#列出所有表\dselect * from users;(ambari界面登录的用户)hosts 主机列表 备库192.168.159.12安装好数据库,不要启动rm -rf /var/lib/pgsql/data/* 主库192.168.159.11root vi postgresql.conf AI检测代码解析 [root@hdp1 data]# cat postgresql.conf # ...
{ /* Set BM_VALID, terminate IO, and wake up any waiters */ TerminateBufferIO(bufHdr, false, BM_VALID); } VacuumPageMiss++; if (VacuumCostActive) VacuumCostBalance += VacuumCostPageMiss; TRACE_POSTGRESQL_BUFFER_READ_DONE(forkNum, blockNum, smgr->smgr_rnode.node.spcNode, smgr->smgr_...
(indicating the server is accepting connections) and1(indicating the server is rejecting connections, such as during startup or a smart shutdown) are treated as valid outcomes. Following Kubernetes standards, if the liveness probe fails, the kubelet will terminate the container, which will then ...
If the lock exceeds the specified time, pg_repack will forcibly terminate conflicting queries. The default timeout is set to 60 seconds. -D, –no-kill-backend Prevents the termination of other backends when a –wait-timeout occurs. -k, –no-superuser-check Bypass the superuser validation ...
I then ran this command to kill off all active connections: SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE -- don't kill my own connection! pid <> pg_backend_pid() -- don't kill the connections to other databases AND datname = 'vapor_database'; Finally, a third reque...
This implementation will terminate the TLS connection at the gateway, meaning the encrypted connections ends at the gateway and downstream data is proxied unencrypted. We'll assume that the TLS cert used by the server has a wildcard for *.db.example.com, though if you wanted to send separate...