Le 21/05/2015 14:46, Glyn Astill a écrit :
From: Thomas SIMON <tsimon@xxxxxxxxxxx>
To: Glyn Astill <glynastill@xxxxxxxxxxx>
Cc: "pgsql-admin@xxxxxxxxxxxxxx" <pgsql-admin@xxxxxxxxxxxxxx>
Sent: Thursday, 21 May 2015, 13:28
Subject: Re: 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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