[squid-users] Squid Cache Dir Running Out of Space from Ed Lafferty on 2006-12-27 (squid-users)

From: Ed Lafferty <elafferty@dont-contact.us>
Date: Wed, 27 Dec 2006 13:09:53 -0500

I am running Squid Version 2.6.STABLE5 on CentOS 4.2. Squid is
configured with two cache directories /asc/array1/squid/var/cache and
/asc/array2/squid/var/cache. Logs are configured to write to the
default location /usr/local/squid/var/logs. Here are snippets of
squid.conf:

#Default:
# cache_dir ufs /usr/local/squid/var/cache 100 16 256
cache_dir ufs /asc/array1/squid/var/cache/ 600000 16 256
#cache_dir ufs /asc/array2/squid/var/cache/ 600000 16 256
#cache_dir ufs /asc/array3/squid/var/cache/ 600000 16 256
--the 600000 was 800000. I decreased the value and ran #/squid -z to
try and resize the cache. I did not see any change.
...
# To log the request via syslog specify a filepath of "syslog"
access_log /usr/local/squid/var/logs/access.log combined
...
#Default:
cache_log /usr/local/squid/var/logs/cache.log
...
#Default:
cache_store_log /usr/local/squid/var/logs/store.log
...

Squid has shut down with the following error:

2006/12/27 11:27:04| Rebuilding storage in /asc/array1/squid/var/cache/
(DIRTY)
2006/12/27 11:27:04| diskHandleWrite: FD 12: disk write error: (28) No
space left on device
FATAL: Write failure -- check your disk space and cache.log
Squid Cache (Version 2.6.STABLE5): Terminated abnormally.
CPU Usage: 0.017 seconds = 0.012 user + 0.005 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 0

Here is the space left on the server:

Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
90G 12G 74G 14% /
/dev/hda1 99M 12M 82M 13% /boot
none 1014M 0 1014M 0% /dev/shm
/dev/sda1 101G 89G 7.4G 93% /asc/array1
/dev/sdb1 101G 96G 0 100% /asc/array2
/dev/sdc1 101G 93M 96G 1% /asc/array3

In order to get Squid working again, I have shut down /asc/array2 as a
cache drive. However, this leaves me with 7.4GB available on the other
cache drive and I am afraid it will run out of space quickly.

So, two questions, why am I running out of space. Are there other logs
going to the cache drives that I don't know about? Second, can I shrink
the size of the cache? Other than taking down Squid for a few moments,
will it do anything else bad? How bad would it be if I were to
completely wipe out the cache directories and rebuild them from scratch?

Thanks in advance for any help you can give.

Sincerely,
  Ed Lafferty
  Mgr, Network Operations
  Bolt Inc.
  http://www.bolt.com
I am running Squid Version 2.6.STABLE5 on CentOS 4.2. Squid is
configured with two cache directories /asc/array1/squid/var/cache and
/asc/array2/squid/var/cache. Logs are configured to write to the
default location /usr/local/squid/var/logs. Here are snippets of
squid.conf:

#Default:
# cache_dir ufs /usr/local/squid/var/cache 100 16 256
cache_dir ufs /asc/array1/squid/var/cache/ 600000 16 256
#cache_dir ufs /asc/array2/squid/var/cache/ 600000 16 256
#cache_dir ufs /asc/array3/squid/var/cache/ 600000 16 256
  --the 600000 was 800000. I decreased the value and ran #/squid -z to
try and resize the cache. I did not see any change.
...
# To log the request via syslog specify a filepath of "syslog"
access_log /usr/local/squid/var/logs/access.log combined
...
#Default:
cache_log /usr/local/squid/var/logs/cache.log
...
#Default:
cache_store_log /usr/local/squid/var/logs/store.log
...

Squid has shut down with the following error:

2006/12/27 11:27:04| Rebuilding storage in /asc/array1/squid/var/cache/
(DIRTY)
2006/12/27 11:27:04| diskHandleWrite: FD 12: disk write error: (28) No
space left on device
FATAL: Write failure -- check your disk space and cache.log
Squid Cache (Version 2.6.STABLE5): Terminated abnormally.
CPU Usage: 0.017 seconds = 0.012 user + 0.005 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 0

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