我有一个在vps上使用postgresql的网站。连续2天同时出现错误，并且postgres服务器重新启动
1天：
2019-03-15 05:58:53.305 UTC [1329] LOG: shutting down
2019-03-15 05:58:53.313 UTC [1311] LOG: checkpointer process (PID 1329) exited with exit code 0
2019-03-15 05:58:53.313 UTC [1311] LOG: terminating any other active server processes
2019-03-15 05:58:53.314 UTC [6441] retouch@retouch_db WARNING: terminating connection because of crash of another server process
2019-03-15 05:58:53.314 UTC [6441] retouch@retouch_db DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another
server process exited abnormally and possibly corrupted shared memory.
2天：
2019-03-16 05:53:10.368 UTC [16248] LOG: shutting down
2019-03-16 05:53:10.375 UTC [16245] LOG: checkpointer process (PID 16248) exited with exit code 0
2019-03-16 05:53:10.375 UTC [16245] LOG: terminating any other active server processes
2019-03-16 05:53:10.376 UTC [25344] retouch@retouch_db WARNING: terminating connection because of crash of another server process
2019-03-16 05:53:10.376 UTC [25344] retouch@retouch_db DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because anothe
r server process exited abnormally and possibly corrupted shared memory.
我对站点进行负载测试，并将请求流直接发送到数据库，并且效果很好。但是在特定时间连续两天，我在重新启动服务器时遇到错误
服务器有足够的内存来启动服务器。图表显示内存没有用完，并且在dmesg中没有postgres的记录