On Wed, 2022-05-11 at 00:59 +0800, Sudhir Guna wrote:
> We have recently upgraded Postgresql 9.4 standalone server to Postgresql 11.2 with High Availability (2 servers :
Masterand Standby).
>
> While trying to test using ETL applications and reports, we observe that the ETL jobs fails with below error,
>
> 2022/05/06 16:27:36 - Error occurred while trying to connect to the database
> 2022/05/06 16:27:36 - Error connecting to database: (using class org.postgresql.Driver)
> 2022/05/06 16:27:36 - FATAL: Sorry, too many clients already
>
> We have increased the max_connections = 1000 in postgresql.conf file.
>
> It worked ok for a day and later we get the same error message.
>
> Please help to advise on any additional settings required. The prior Postgresql 9.4 had the default max_connections =
100andthe applications worked fine.
Some application that uses the database has a connection leak: it opens new connections
without closing old ones. Examine "pg_stat_activity" to find out which application is
at fault, and then go and fix that application.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
