Re: [squid-users] squid proccess freeze

Hi Alexandre,

Alexandre Correa wrote:
>> How many users is your Squid box serving? It's strange that there is no
>> errors. Where have you defined the cache_log directive in your squid.conf?
>
> +- 300~400 users simultaneously
>
> cache_access_log none
> cache_log /var/log/squid/cache.log
> cache_store_log none
>
> cache_dir aufs /var/spool/squid 110000 72 256
> cache_mem 256 MB

That's a 110 GB cache which is big. So that is absolutely nothing there
in /var/log/squid/cache.log before your Squid process goes Zombie?

>
>> When you say "after some time running .. squid proccess refusing
>> connections", is it a few minutes or hours or even days?
> an accurate time does not exist, after some hours, when the load increases ..
>> Can you post the output of "squidclient mgr:info"?
>>
>> Posting your squid.conf may help too.
>
> maresia# squidclient mgr:info
> Squid Object Cache: Version 2.6.STABLE16
> Start Time: Fri, 02 Nov 2007 04:43:44 GMT
> Current Time: Fri, 02 Nov 2007 07:24:54 GMT
> Connection information for squid:
> Number of clients accessing cache: 0
> Number of HTTP requests received: 28162
> Number of ICP messages received: 21
> Number of ICP messages sent: 21

So you also have sibling caches too? But why is there so little ICP
traffic compared to HTTP traffic?

> Number of queued ICP replies: 0
> Request failure ratio: 0.00
> Average HTTP requests per minute since start: 100.2
> Average ICP messages per minute since start: 0.1
> Select loop called: 795855 times, 21.196 ms avg
> Cache information for squid:
> Request Hit Ratios: 5min: 48.1%, 60min: 43.4%
> Byte Hit Ratios: 5min: 4.5%, 60min: 6.6%
> Request Memory Hit Ratios: 5min: 2.2%, 60min: 1.2%
> Request Disk Hit Ratios: 5min: 50.0%, 60min: 26.6%
> Storage Swap size: 2980474 KB
> Storage Mem size: 50900 KB
> Mean Object Size: 17.57 KB
> Requests given to unlinkd: 0
> Median Service Times (seconds) 5 min 60 min:
> HTTP Requests (All): 0.08265 0.09736
> Cache Misses: 0.39928 0.37825
> Cache Hits: 0.00286 0.00463
> Near Hits: 0.09219 0.09219
> Not-Modified Replies: 0.00286 0.00000
> DNS Lookups: 0.10428 0.17826
> ICP Queries: 0.00000 0.00000
> Resource usage for squid:
> UP Time: 16869.319 seconds
> CPU Time: 85.383 seconds
> CPU Usage: 0.51%
> CPU Usage, 5 minute avg: 0.38%
> CPU Usage, 60 minute avg: 0.28%
> Process Data Segment Size via sbrk(): 154172 KB
> Maximum Resident Size: 159328 KB
> Page faults with physical i/o: 1
> Memory accounted for:
> Total accounted: 75685 KB
> memPoolAlloc calls: 4466729
> memPoolFree calls: 4009299
> File descriptor usage for squid:
> Maximum number of file descriptors: 4096
> Largest file desc currently in use: 26
> Number of file desc currently in use: 21
> Files queued for open: 0
> Available number of file descriptors: 4075
> Reserved number of file descriptors: 100
> Store Disk files open: 0
> IO loop method: kqueue
> Internal Data Structures:
> 169850 StoreEntries
> 5569 StoreEntries with MemObjects
> 5564 Hot Object Cache Items
> 169667 on-disk objects
>
>
> at this moment i have less traffic/users .. i will run later when load
> increase.. (if squid not freeze before).. it´s very strange..

When your Squid process gets freeze or goes zombie, what errors does
your web browser gives you? I guess that machine does not loose network
connectivity?

>
>
> kernel compiled with options: (6.2-RELEASE-p8 FreeBSD)
>
>
> options SYSVSHM # SYSV-style shared memory
> options SYSVMSG # SYSV-style message queues
> options SYSVSEM # SYSV-style semaphores
>
> options MSGMNB=16384
> options MSGMNI=41
> options MSGSEG=2049
> options MSGSSZ=64
> options MSGTQL=512
> options SHMSEG=16
> options SHMMNI=32
> options SHMMAX=2097152
> options SHMALL=3096

When your Squid process goes to a zombie state again, check the number
of mbufs used at that very moment.

Maybe, just maybe, it could be related to your mbufs running out.

>
>
> thanks !!

Thanking you...

>
>
> regards,
>
> AlexandrE
>
>
>>
>>
>>> # ps auwx | grep squid
>>>
>>> USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND
>>> squid 807 0.0 16.1 679548 671268 ?? T 10:52PM 10:50.02 (squid)
>>> -D -s (squid)
>>> squid 864 0.0 0.0 2472 752 ?? Is 10:52PM 0:00.00 (unlinkd)
>>> (unlinkd)
>>> root 36341 0.0 0.0 5852 1212 p0 R+ 10:59AM 0:00.00 grep squi=
>>> d
>>>
>>> using AUFS !!
>>>
>>> squid 2.6.STABLE16
>>> configure options:
>>>
>>> '--program-prefix=3D' '--prefix=3D/usr' '--exec-prefix=3D/usr'
>>> '--bindir=3D/usr/bin' '--sbindir=3D/usr/sbin' '--sysconfdir=3D/etc'
>>> '--includedir=3D/usr/include' '--libdir=3D/usr/lib' '--libexecdir=3D/usr/li=
>>> bexec'
>>> '--sharedstatedir=3D/usr/com' '--mandir=3D/usr/share/man'
>>> '--infodir=3D/usr/share/info' '--exec_prefix=3D/usr' '--bindir=3D/usr/sbin'
>>> '--libexecdir=3D/usr/lib/squid' '--localstatedir=3D/var'
>>> '--sysconfdir=3D/etc/squid' '--disable-useragent-log' '--disable-referer-lo=
>>> g'
>>> '--enable-kqueue' '--enable-snmp' '--enable-removal-policies=3Dheap,lru'
>>> '--enable-storeio=3Daufs,coss,diskd,ufs' '--enable-ssl'
>>> '--enable-ipf-transparent' '--enable-linux-netfilter' '--with-pthreads'
>>> '--disable-dependency-tracking' '--enable-cachemgr-hostname=3Dlocalhost'
>>> '--disable-ident-lookups' '--enable-underscores' '--datadir=3D/usr/share'
>>> '--with-maxfd=3D4096' '--enable-async-io' '--disable-dlmalloc' '--with-aio'
>>>
>>> somebody knowns wat=B4s happens ?!
>> Is that the output of "squid -v"? By the way, what is the 3D reference
>> in your compilation parameters for?
>>
>> Did you install Squid from FreeBSD ports or did you compile it yourself?
>>
>>>
>>> thanks..
>>>
>>> regards,
>>>
>>
>> --
>>
>> With best regards and good wishes,
>>
>> Yours sincerely,
>>
>> Tek Bahadur Limbu
>>
>> System Administrator
>>
>> (TAG/TDG Group)
>> Jwl Systems Department
>>
>> Worldlink Communications Pvt. Ltd.
>>
>> Jawalakhel, Nepal
>>
>> http://www.wlink.com.np
>>
>> http://teklimbu.wordpress.com
>>
>
>
>

-- 
With best regards and good wishes,
Yours sincerely,
Tek Bahadur Limbu
System Administrator
(TAG/TDG Group)
Jwl Systems Department
Worldlink Communications Pvt. Ltd.
Jawalakhel, Nepal
http://www.wlink.com.np
http://teklimbu.wordpress.com