| From: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> |
|---|---|
| To: | Sudhir Guna <sudhir(dot)guna(dot)sg(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: DB connection issue suggestions |
| Date: | 2022-05-11 06:13:04 |
| Message-ID: | ef2ffac1645187d4161e1c6171607cf764035630.camel@cybertec.at |
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| Lists: | pgsql-performance |
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 : Master and 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 = 100and the 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
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