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Hi, PGv14.8, OS RHEL8, no SSL enabled in this database, we have a lot of client sessions who check it’s ssl state by query, all other sessions got done very quickly, but only 1 session hang there in 100% cpu tens of hours, even pg_terminate_backend
does not make it stopped either. It looks like abnormal. select ssl from pg_stat_ssl where pid=pg_backend_pid(); testdb=# select pid,usename,application_name,query_start,xact_start,state_change,wait_event_type,state,query from pg_stat_activity where pid=1245344; pid | usename | application_name | query_start | xact_start | state_change | wait_event_type | state | query ---------+---------+------------------------+------------------------------+-------------------------------+------------------------------+-----------------+ --------+-------------------------------------------------------- 1245344 | test | PostgreSQL JDBC Driver | 2023-09-03 02:36:23.40238+00 | 2023-09-03 02:36:23.402331+00 | 2023-09-03 02:36:23.40238+00 | | active | select ssl from pg_stat_ssl where pid=pg_backend_pid() (1 row) testdb=# select pid,usename,application_name,query_start,xact_start,state_change,wait_event_type,state,query from pg_stat_activity where pid=1245344; pid | usename | application_name | query_start | xact_start | state_change | wait_event_type | state | query ---------+---------+------------------------+------------------------------+-------------------------------+------------------------------+-----------------+ --------+-------------------------------------------------------- 1245344 | test | PostgreSQL JDBC Driver | 2023-09-03 02:36:23.40238+00 | 2023-09-03 02:36:23.402331+00 | 2023-09-03 02:36:23.40238+00 | | active | select ssl from pg_stat_ssl where pid=pg_backend_pid() (1 row) testdb=# select pid,usename,application_name,query_start,xact_start,state_change,wait_event_type,state,query from pg_stat_activity where pid=1245344; pid | usename | application_name | query_start | xact_start | state_change | wait_event_type | state | query ---------+---------+------------------------+------------------------------+-------------------------------+------------------------------+-----------------+ --------+-------------------------------------------------------- 1245344 | test | PostgreSQL JDBC Driver | 2023-09-03 02:36:23.40238+00 | 2023-09-03 02:36:23.402331+00 | 2023-09-03 02:36:23.40238+00 | | active | select ssl from pg_stat_ssl where pid=pg_backend_pid() (1 row) PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ nMaj nMin WCHAN COMMAND 1245344 postgres 20 0 32.5g 12468 12164 R 99.5 0.0 4219:12 0 1343 - postgres: test testdb 10.250.193.40(48282) BIND #0 ensure_record_cache_typmod_slot_exists (typmod=0) at typcache.c:1714 #1 0x000000000091185b in assign_record_type_typmod (tupDesc=<optimized out>, tupDesc@entry=0x27bc738) at typcache.c:2001 #2 0x000000000091df03 in internal_get_result_type (funcid=<optimized out>, call_expr=<optimized out>, rsinfo=<optimized out>, resultTypeId=<optimized out>, resultTupleDesc=0x7ffc9dff8cd0) at funcapi.c:393 #3 0x000000000091e263 in get_expr_result_type (expr=expr@entry=0x2792798, resultTypeId=resultTypeId@entry=0x7ffc9dff8ccc, resultTupleDesc=resultTupleDesc@entry=0x7ffc9dff8cd0) at funcapi.c:230 #4 0x00000000006a2fa5 in ExecInitFunctionScan (node=node@entry=0x273afa8, estate=estate@entry=0x269e948, eflags=eflags@entry=16) at nodeFunctionscan.c:370 #5 0x000000000069084e in ExecInitNode (node=node@entry=0x273afa8, estate=estate@entry=0x269e948, eflags=eflags@entry=16) at execProcnode.c:255 #6 0x000000000068a96d in InitPlan (eflags=16, queryDesc=0x273b2d8) at execMain.c:936 #7 standard_ExecutorStart (queryDesc=0x273b2d8, eflags=16) at execMain.c:263 #8 0x00007f67c2821d5d in pgss_ExecutorStart (queryDesc=0x273b2d8, eflags=<optimized out>) at pg_stat_statements.c:965 #9 0x00000000007fc226 in PortalStart (portal=portal@entry=0x26848b8, params=params@entry=0x0, eflags=eflags@entry=0, snapshot=snapshot@entry=0x0) at pquery.c:514 #10 0x00000000007fa27f in exec_bind_message (input_message=0x7ffc9dff90d0) at postgres.c:1995 #11 PostgresMain (argc=argc@entry=1, argv=argv@entry=0x7ffc9dff9370, dbname=<optimized out>, username=<optimized out>) at postgres.c:4552 #12 0x000000000077a4ea in BackendRun (port=<optimized out>, port=<optimized out>) at postmaster.c:4537 #13 BackendStartup (port=<optimized out>) at postmaster.c:4259 #14 ServerLoop () at postmaster.c:1745 #15 0x000000000077b363 in PostmasterMain (argc=argc@entry=5, argv=argv@entry=0x256abc0) at postmaster.c:1417 #16 0x00000000004fec63 in main (argc=5, argv=0x256abc0) at main.c:209 Thanks, James |
