From: Thomas SIMON <tsimon@neteven.com>
To: Glyn Astill <glynastill@yahoo.co.uk>
Cc: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: Re: Performances issues with SSD volume ?
Date: Thu, 21 May 2015 16:47:15 +0200
Message-ID: <555DEFF3.7010803@neteven.com> (raw)
In-Reply-To: <1874969609.5822635.1432212392486.JavaMail.yahoo@mail.yahoo.com>
References: <555DCF59.3060808@neteven.com>
<1874969609.5822635.1432212392486.JavaMail.yahoo@mail.yahoo.com>
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Le 21/05/2015 14:46, Glyn Astill a écrit :
>> From: Thomas SIMON <tsimon@neteven.com>
>> To: Glyn Astill <glynastill@yahoo.co.uk>
>> Cc: "pgsql-admin@postgresql.org" <pgsql-admin@postgresql.org>
>> Sent: Thursday, 21 May 2015, 13:28
>> Subject: Re: [ADMIN] Performances issues with SSD volume ?
>>
>>
>> disk was already in noop mode
>>
>> cat /sys/block/sdc/queue/scheduler
>> noop [deadline] cfq
>>
>>
>
> No, the output shows the i/o scheduler between the brackets. That says it's deadline for sdc.
>
> Of course deadline may well be the better option for you, but it's worth testing.
You're totally right. I changed parameter to noop and redo pgbench test,
but I've seen no significantly differences.
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To: pgsql-admin@postgresql.org
Cc: tsimon@neteven.com, glynastill@yahoo.co.uk
Subject: Re: Performances issues with SSD volume ?
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