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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