Re: Max connections reached without max connections reached

[James Sewell <james.sewell@xxxxxxxxxxxx>]

So I guess the question becomes why are they spending so much time in
the startup state.  That should take mere milliseconds, unless the
clients are being slow to handle the authentication exchange?

I'm also wondering a bit about whether they're being blocked on a lock,
eg. due to something taking an exclusive lock on pg_authid or pg_database.
pg_locks might be interesting to check.

It's v odd as it happens *sometimes* - having said that it's happening right this moment:

[enterprisedb@oprpgs001 edb-as-11]$ ps -ef|grep postgres:  | wc -l
517

[enterprisedb@oprpgs001 ~]$ ps -ef|grep postgres: | grep -i start | wc -l
480

postgres=# select count(*) from pg_stat_activity;
 count
-------
   97
(1 row)

postgres=# select * from pg_locks where not granted;
 locktype | database | relation | page | tuple | virtualxid | transactionid | classid | objid | objsubid | virtualtransaction | pid | mode | granted | fastpath
----------+----------+----------+------+-------+------------+---------------+---------+-------+----------+--------------------+-----+------+---------+----------
(0 rows)

 

Logs are showing a stream of:

2021-11-24 10:50:58 AEDT [869]: [1-1] user=u_rundeck_rw,db=rundeck_cluster,client=10.154.19.23 10.154.19.23(57122) (0:53300)FATAL:  remaining connection slots are reserved for non-replication superuser connections
2021-11-24 10:50:58 AEDT [870]: [1-1] user=u_rundeck_rw,db=rundeck_cluster,client=10.154.19.23 10.154.19.23(57124) (0:53300)FATAL:  remaining connection slots are reserved for non-replication superuser connections
2021-11-24 10:50:58 AEDT [871]: [1-1] user=u_rundeck_rw,db=rundeck_cluster,client=10.154.19.23 10.154.19.23(57126) (0:53300)FATAL:  remaining connection slots are reserved for non-replication superuser connections

James

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