[squid-users] Storage mem in 3.5.4, not sure what is happening

[Sebastian Goicochea]

We've found the problem:

As we are only using just one worker, memory_cache_shared has to be off 
when rock is enabled.
It wasn't clear at first because I interpreted that memory_cache_shared 
could be on no matter how many workers you had or what fs were you using.



Thanks for your time,
Sebastian



El 20/05/15 a las 11:50, Sebastian Goicochea escribió:
> Hello Amos,
>
> Here's up time
> Start Time:    Wed, 20 May 2015 14:33:02 GMT
> Current Time:    Wed, 20 May 2015 14:41:46 GMT
>
> It's a short period of time because we've been restariting it.
>
> /var/run/squid and /dev/shm exist
>
> # ls /var/run/squid -1
> squid-coordinator.ipc
> squid-kid-1.ipc
> squid-kid-2.ipc
>
> # ls /dev/shm -1
> squid-cache1.p1.rock_map_anchors.shm
> squid-cache1.p1.rock_map_slices.shm
> squid-cache1.p1.rock_spaces.shm
> squid-cache_mem_ex.shm
> squid-cache_mem_map_anchors.shm
> squid-cache_mem_map_slices.shm
> squid-cache_mem_space.shm
> squid-cf__metadata.shm
> squid-cf__queues.shm
> squid-cf__readers.shm
> squid-io_file__metadata.shm
> squid-io_file__queues.shm
> squid-io_file__readers.shm
> squid-squid-page-pool.shm
>
> We've found something interesting: disabling rock gets hot objets out 
> of 0 and we get MEM_HITs right away.
>
> Cache information for squid:
>     Hits as % of all requests:    5min: 5.0%, 60min: 4.6%
>     Hits as % of bytes sent:    5min: 10.7%, 60min: 8.8%
>     Memory hits as % of hit requests:    5min: 36.6%, 60min: 36.9%
>     Disk hits as % of hit requests:    5min: 38.3%, 60min: 40.7%
>     Storage Swap size:    173674816 KB
>     Storage Swap capacity:    19.7% used, 80.3% free
>     Storage Mem size:    115528 KB
>     Storage Mem capacity:    11.0% used, 89.0% free
>     Mean Object Size:    526.13 KB
>     Requests given to unlinkd:    0
>
> Internal Data Structures:
>     337773 StoreEntries
>       8536 StoreEntries with MemObjects
>       8382 Hot Object Cache Items
>     330097 on-disk objects
>
>
>
> Is there any relation between rock beeing active and storage mem?
>
>
> Thanks a lot,
> Sebastian
>
>
> El 20/05/15 a las 01:53, Amos Jeffries escribió:
>> On 20/05/2015 3:41 a.m., Sebastian Goicochea wrote:
>>> Hello everyone, we're having a problem, we updated from squid 3.5.3 to
>>> 3.5.4 (bellow are the configuration options) and enabled rock fs.
>>>
>>> The problem that arose is that I don't know if objects are being stored
>>> in RAM, but what I do know is that there are no MEM_HITs in the
>>> access.log file
>>>
>>>
>>> This is how I enabled rock:
>>> cache_dir rock  /cache/rock  512  max-size=32768
>>>
>>>
>>> This is what I get from squidclient:
>> Whats the "Start Time" information displayed at the top of that report?
>>   and does it remain unchanged across many minutes?
>>
>> I suspect that with no memory hits and sine 5min == 60min hits your
>> Squid may be in a cycle of crashes or assertions.
>>
>> NOTE: to enable rock and other SMP features you need /var/run/squid and
>> /dev/shm to exist. Some OS seem not to create or mount them by default.
>>
>> Amos
>>
>> _______________________________________________
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>> squid-users at lists.squid-cache.org
>> http://lists.squid-cache.org/listinfo/squid-users
>
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