Date: Wed, 2 Aug 2006 20:10:05 +1000 From: Q <qdolan@gmail.com> To: freebsd-fs@freebsd.org Subject: Problem with ufs not releasing vm_pages on busy volume. Message-ID: <A05A5F4D-27B0-410B-A32D-0432D22D5A00@gmail.com>
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Hi, I have a problem that seems to be related to something ufs related not releasing some vm_pages on busy filesystems. I have two servers running PostgreSQL, one running 6.0-RELEASE, the other 6.1-RELEASE. Both are under the same (fairly heavy) load, performing the same operations in bursts every five minutes. The filesystems in question are 450-500Gig, each server using a different brand of RAID card, they both have soft-updates enabled. The problem is that both servers are seeing an accumulation of about 100Mb of active pages per day (looking at vm.stats.vm.v_active_count) that never get released. The only way to release these pages is to unmount the filesystem and remount it. Failing to do this results in the server eventually locking up. If someone could provide me with some direction on how to go about tracking down what might be causing this to happen it would be much appreciated. -- Seeya...Q -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _____ / Quinton Dolan - qdolan@gmail.com __ __/ / / __/ / / / __ / _/ / / Gold Coast, QLD, Australia __/ __/ __/ ____/ / - / Ph: +61 419 729 806 _______ / _\
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