xfs
[Top] [All Lists]

Re: XFS hangs and freezes with LSI 9265-8i controller on high i/o

To: Matthew Whittaker-Williams <matthew@xxxxxxxxx>
Subject: Re: XFS hangs and freezes with LSI 9265-8i controller on high i/o
From: Andre Noll <maan@xxxxxxxxxxxxxxx>
Date: Wed, 13 Jun 2012 13:59:34 +0200
Cc: xfs@xxxxxxxxxxx
In-reply-to: <4FD8552C.4090208@xxxxxxxxx>
References: <4FD66513.2000108@xxxxxxxxx> <20120612011812.GK22848@dastard> <4FD766A7.9030908@xxxxxxxxx> <20120613011950.GN22848@dastard> <4FD8552C.4090208@xxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14)
On Wed, Jun 13, 10:54, Matthew Whittaker-Williams wrote:
> Current Cache Policy: WriteBack, ReadAheadNone, Direct, Write Cache OK if Bad 
> BBU
> Disk Cache Policy   : Disk's Default

Check if these two policy settings are what you really want. AFAICT
they can make a huge difference, depending on the workload.

Here's what gives best performance. Of course these are also the most
risky settings, so use with care:

        Current Cache Policy: WriteBack, ReadAdaptive, Cached, Write Cache OK 
if Bad BBU
        Disk Cache Policy: Enabled

To select these settings for all lds on adapter 0, use

        CLI=MegaCli; lsi_adapter_number=0
        $CLI -ldsetprop CachedBadBBU -LALL -a$lsi_adapter_number &&
        $CLI -ldsetprop -Cached -LAll -a$lsi_adapter_number &&
        $CLI -ldsetprop -EnDskCache -LAll -a$lsi_adapter_number &&
        $CLI -ldsetprop WB -LALL -a$lsi_adapter_number

Best
Andre
-- 
The only person who always got his work done by Friday was Robinson Crusoe

Attachment: signature.asc
Description: Digital signature

<Prev in Thread] Current Thread [Next in Thread>