On Mon, May 30, 2022 at 01:19:56AM +0000, James Pang (chaolpan) wrote: > 1. extensions > shared_preload_libraries = > 'orafce,pgaudit,pg_cron,pg_stat_statements,set_user' > 2. psql can not login now ,it hang there too, so can not check anything from > pg_stats_* views > 3. one main app user and 2 schemas ,no long running transactions . > 4. we use /pgdata , it's on xfs , lvm/vg RHEL8.4 ,it's a shared storage, no > use root filesystem. > /dev/mapper/pgdatavg-pgdatalv 500G 230G 271G 46% /pgdata > /dev/mapper/pgdatavg-pgarchivelv 190G 1.5G 189G 1% /pgarchive > /dev/mapper/pgdatavg-pgwallv 100G 34G 67G 34% /pgwal
What are the LVM PVs ? Is it a scsi/virt device ? Or iscsi/drbd/??? I didn't hear back if there's any kernel errors. Is the storage broken/stuck/disconnected ? Can you run "time find /pgdata /pgarchive /pgwal -ls |wc" ? Could you run "ps -u postgres -O wchan=============================" Can you strace one of the stuck backends ? It sounds like you'll have to restart the service or VM (forcibly if necessary) to resolve the immediate issue and then collect the other info, and leave a "psql" open to try to (if the problem recurs) check pg_stat_activity and other DB info.
