Postgresql Conections Get Stuck on BIND and Server Don't Reboot

From: Amine Tengilimoglu <aminetengilimoglu(at)gmail(dot)com>
To: pgsql-admin(at)lists(dot)postgresql(dot)org, pgsql-admin(at)postgresql(dot)org
Subject: Postgresql Conections Get Stuck on BIND and Server Don't Reboot
Date: 2018-06-21 07:26:52
Message-ID: CADTdw-yjBhn9QvADn6CTqZAF8eXoroxYn+HLARHi_wsa2Cxu2Q@mail.gmail.com
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Hello everyone;

We are facing an error 3 times as the following. Our Postgresql 9.6.5
database servers has got "stuck". And we couldn’t fix this. There is
nothing in the logs to indicate a problem. We have tried restarting the
server. Is there anyone who faced this problem before?

Postgres version = 9.6.5

Shared buffers = 12GB

Max_connection = 800

Server RAM = 94GB

Linux CentOS7 = Linux 3.10.0-693.el7.x86_64 (16 CPU)

We have a standby server but asynchronous status...

Before BIND status, our process like this;

After a while;

At the time of problem, iostat:

Does anyone have any ideas on this??

thanks in advance....

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