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

[Sebastian Goicochea]

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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