Date: Mon, 22 Nov 2010 00:43:03 +0300 From: Eir Nym <eirnym@gmail.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: tmpfs out of space (ZFS related?) Message-ID: <AANLkTi=Aw3KQqeDy1Bxn7tJrsvOn-D=y-ChCOpVu4E8N@mail.gmail.com> In-Reply-To: <icc2ih$e5t$1@dough.gmane.org> References: <icc2ih$e5t$1@dough.gmane.org>
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On 22 November 2010 00:22, Ivan Voras <ivoras@freebsd.org> wrote: > I got a curious error today while starting PostgreSQL, complaining about > "out of space" errno while creating lock file on /tmp. > > /tmp on this machine is mounted as tmpfs and indeed, here is the statisti= c: > > biggie:/# df -i > Filesystem =C2=A0 =C2=A01M-blocks =C2=A0Used =C2=A0Avail Capacity iused = =C2=A0 =C2=A0 ifree %iused Mounted > on > /dev/mfid0s1a =C2=A0 =C2=A0 =C2=A09912 =C2=A05193 =C2=A0 3926 =C2=A0 =C2= =A057% =C2=A0306079 =C2=A0 1012831 =C2=A0 23% =C2=A0 / > devfs =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 0 =C2=A0 = =C2=A0 0 =C2=A0 =C2=A0 =C2=A00 =C2=A0 100% =C2=A0 =C2=A0 =C2=A0 0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 0 =C2=A0100% =C2=A0 /dev > fdescfs =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 0 =C2=A0 =C2=A0 = 0 =C2=A0 =C2=A0 =C2=A00 =C2=A0 100% =C2=A0 =C2=A0 =C2=A0 4 =C2=A0 =C2=A0 11= 092 =C2=A0 =C2=A00% /dev/fd > tmpfs =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 0 =C2=A0 = =C2=A0 0 =C2=A0 =C2=A0 =C2=A00 =C2=A0 100% =C2=A0 =C2=A0 =C2=A0 9 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 0 =C2=A0100% =C2=A0 /tmp > tank =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 376044 =C2=A0 =C2=A0 0 376= 044 =C2=A0 =C2=A0 0% =C2=A0 =C2=A0 =C2=A0 4 770138347 =C2=A0 =C2=A00% =C2= =A0 /tank > tank/ports =C2=A0 =C2=A0 =C2=A0 376658 =C2=A0 614 376044 =C2=A0 =C2=A0 0%= =C2=A0145919 770138347 =C2=A0 =C2=A00% > /usr/ports > tank/mysql =C2=A0 =C2=A0 =C2=A0 376073 =C2=A0 =C2=A029 376044 =C2=A0 =C2= =A0 0% =C2=A0 =C2=A0 102 770138347 =C2=A0 =C2=A00% > /var/db/mysql > tank/pgdata90 =C2=A0 =C2=A0400469 24425 376044 =C2=A0 =C2=A0 6% =C2=A0 = =C2=A01047 770138347 =C2=A0 =C2=A00% > /tank/pgdata90 > > On the other hand, "top" reports this: > > last pid: 79667; =C2=A0load averages: =C2=A00.08, =C2=A00.68, =C2=A00.77 = =C2=A0 =C2=A0up 1+09:12:13 > 00:11:33 > 44 processes: =C2=A01 running, 43 sleeping > CPU: =C2=A00.0% user, =C2=A00.0% nice, =C2=A00.0% system, =C2=A00.0% inte= rrupt, =C2=A0100% idle > Mem: 13M Active, 46M Inact, 15G Wired, 232K Cache, 1458M Buf, 8358M Free > Swap: 1024M Total, 1024M Free > > Note the "8358M free" report. > > The server has ZFS and was doing IO intensive database work on it; the 8 = GB > free memory comes from PostgreSQL being restarted and freeing the memory > (but failing to start again...). > > Starting PostgreSQL gets me this message: > Nov 22 00:18:24 biggie postgres[79696]: [1-1] FATAL: =C2=A0could not writ= e lock > file "/tmp/.s.PGSQL.5432.lock": No space left on device > > This is 8-STABLE amd64. > > Running "touch /tmp/abc" works, and creates a file. Running "echo abc > > /tmp/abc" doesn't return an error but *doesn't write anything to the file= *, > just creates a directory entry. > > The status doesn't change over time, i.e. "df" on tmpfs always shows "0 > free". > Which type of MFS do you use? I think you shold use "swap-backed" for your /tmp, not "malloc-based". Last type is only for in-kernel file system. > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " >
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