> 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.