Date: Tue, 11 Oct 2011 10:34:04 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: =?iso-8859-1?Q?Micka=EBl_Maillot?= <mickael.maillot@gmail.com>, "Christer Solskogen" <christer.solskogen@gmail.com> Cc: freebsd-stable@freebsd.org, Ivan Voras <ivoras@freebsd.org>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: "High" cpu usage when using ZFS cache device Message-ID: <852472071289497FA806928D0B41D0FE@multiplay.co.uk> References: <AANLkTinzwyhABYxzWknzRFzLCbcDSd3BU2kQ5tX_SSk-@mail.gmail.com><20101116003029.GC79816@numachi.com><AANLkTinfTgXzf7t3PtO2VAef7NSkKWc0RnGdpv=6_-Vj@mail.gmail.com><ibtqvp$bfq$1@dough.gmane.org><AANLkTi=tJ-Hf%2BrMqG0=tEzNV2jJW-B_7Yu_ftW4tAMqT@mail.gmail.com><20101116125431.GA90475@icarus.home.lan><AANLkTi=mAWYCnWbWbX9B9fa05iyC_pivu08v-%2BbOf75f@mail.gmail.com><AANLkTi=p9U6gK=Z5GyrAEzU2tDqbx%2ByWY=4eTZ5-0CuF@mail.gmail.com><AANLkTi=XwO0RrU9uY5CF5p%2Bb9co1yneXX7UR2JsF55bL@mail.gmail.com><AANLkTiknP4D5aayotFQ1jFpmov9Vv50GnFdVaXXs39rL@mail.gmail.com> <AANLkTikjd5CgcC3TEhLYuBXGukP0mUCyHtY-FwfYqs1K@mail.gmail.com>
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----- Original Message -----
From: "Mickaël Maillot" <mickael.maillot@gmail.com>
> same problem here after ~ 30 days with a production server and 2 SSD Intel
> X25M as L2.
> so we update and reboot the 8-STABLE server every month.
Old thread but also seeing this on 8.2-RELEASE so looks like this
may still be an issue.
In our case this machine was running mysql with 2 x 60GB cache
SSD's. I checked for usage when the machine was idle just before
reboot to fix and the l2arc thread was still using 100% of a core
even with no disk access happening.
Was a PR ever raised for this?
Regards
Steve
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