Folks,

I'm experiencing some strange behavior with our mysql server and I'm
curious to see if anybody else has had this problem.  Over about a 3
month period, I noticed that the /var partition of our linux server
claims to fill up.  The server is well into it's 3 month cycle now and I
have a short window to play with before the machine will just die.  The
output from df shows:

machine:/var# df -k .
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda3               497861    345390    126767  74% /var

whereas the output from du returns:

machine:/var# du -sk /var
145841  /var

obviously there is a discrepency here.  I ran lsof on the /var directory
and noticed:

machine:/var# lsof +D /var
COMMAND     PID     USER   FD   TYPE     DEVICE    SIZE    NODE NAME
mysqld    10917     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    10917     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    10917     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    10917     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    10917     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock
mysqld    10931     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    10931     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    10931     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    10931     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    10931     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock
mysqld    10932     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    10932     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    10932     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    10932     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    10932     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock
mysqld    10933     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    10933     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    10933     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    10933     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    10933     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock
mysqld    30032     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    30032     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    30032     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    30032     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    30032     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock
mysqld    30146     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    30146     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    30146     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    30146     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    30146     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock
mysqld    30193     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    30193     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    30193     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    30193     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    30193     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock
mysqld    30767     root    3u  unix 0xc2367cc0          144707
/var/run/mysqld/mysqld.sock
mysqld    30767     root    7u  unix 0xc600f660         4464830
/var/run/mysqld/mysqld.sock
mysqld    30767     root   24u  unix 0xc56f2c80         4465358
/var/run/mysqld/mysqld.sock
mysqld    30767     root   62u  unix 0xc1bd7c80         4468136
/var/run/mysqld/mysqld.sock
mysqld    30767     root   82u  unix 0xc2484980         4465577
/var/run/mysqld/mysqld.sock

Is this some sort of unlinking bug?  Naturally, a reboot fixes our
problems for a couple of months.  As I said in the beginning of the
email, I've got a few days/a week before I REALLY need to reboot this
machine.  So I'd love to get some help on chasing this down, in case it
is a bug and we need to get some data from it.

Mark

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