Le 21/05/2015 14:46, Glyn Astill a écrit :
>> From: Thomas SIMON <tsimon(at)neteven(dot)com>
>> To: Glyn Astill <glynastill(at)yahoo(dot)co(dot)uk>
>> Cc: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)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.