Date: Mon, 22 May 2017 14:52:43 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 219457] ZFS ARC eviction & system hangup Message-ID: <bug-219457-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219457 Bug ID: 219457 Summary: ZFS ARC eviction & system hangup Product: Base System Version: 10.3-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: vsasjason@gmail.com I have a machine with 256 GiB of RAM (249 GiB managed) that serves files over plain HTTP with nginx & AIO. After system starup ARC grows to its maximum size - ~233 GiB (so about ten gigs are always free), then it slightly drops down to ~228 GiB. Only after that if I start some processes: 1. They will immediately hang in "D" state; 2. pagedaemon/uma enters clearing state; 3. ARC starts to evict till its minimum size; 4. When ARC reaches minimum entire system becomes unresponsive with a delay (from 5 mins to 8 hours). Some examples of hanging processes: 1. conftest when building devel/m4 (PR in "See Also"); 2. tar on any directory, e.g. tar cvf /dev/null /usr/ports. -- You are receiving this mail because: You are the assignee for the bug.
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