From: Jwiencek3 <jwiencek3@comcast.net>
To: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: RHEL-8 Kernel Settings
Date: Fri, 11 Jun 2021 04:07:51 -0500
Message-ID: <B1EFDEC8-07B5-4823-A404-15A7B90EAE30@comcast.net> (raw)
In-Reply-To: <a21a096321d234c1fd1a3cb9842df8b8002aae34.camel@cybertec.at>
References: <a21a096321d234c1fd1a3cb9842df8b8002aae34.camel@cybertec.at>
Other than HugePages are any other settings determined by the amount of memory on a server?
John
Sent from my iPad
> On Jun 11, 2021, at 1:56 AM, Laurenz Albe <laurenz.albe@cybertec.at> wrote:
>
> On Thu, 2021-06-10 at 13:06 -0500, John Wiencek wrote:
>> I’m looking for assistance in determining kernel setting for a VM RHEL-8 linux server running postgresql-13.
>>
>> I have 3 server groupings
>>
>> 1) 2 vcpu’s 8gb memory
>> 2) 4 cpu’s 16gb memory
>> 3) 8 cpu’s 32gb memory
>>
>> I’ve read various articles and the PostgreSQL documentation . Does anyone have practical experiences doing this kind of set up
>>
>> Do kernel setting requirements change based on the number of cpu’s and amount of memory? I’ve not read any mention of this.
>
> I recommend setting
>
> vm.overcommit_memory = 2
> vm.overcommit_ratio (the correct value depends on your swap)
> vm.swappiness = 0
>
> Also, disable Transparent Hugepages.
>
> Yours,
> Laurenz Albe
> --
> Cybertec | https://www.cybertec-postgresql.com
>
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To: pgsql-admin@postgresql.org
Cc: jwiencek3@comcast.net, laurenz.albe@cybertec.at, pgsql-admin@lists.postgresql.org
Subject: Re: RHEL-8 Kernel Settings
In-Reply-To: <B1EFDEC8-07B5-4823-A404-15A7B90EAE30@comcast.net>
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