With that large array of RAM I would increase those maximum numbers, to let's say, 8 MB, 16 MB, 32 MB, especially if you plan on using heap LFUDA, which is optimized for storing larger objects, and trashes smaller objects faster, where heap GSDF is the opposite, using LRU for memory for the large objects to offset the difference.
---------------------------------------------
Chad E. Naugle
Tech Support II, x. 7981
Travel Impressions, Ltd.
>>> Rajkumar Seenivasan <rkcp613@xxxxxxxxx> 9/22/2010 3:01 PM >>>
Thanks for the tip. I will try with "heap GSDF" to see if it makes a
difference.
Any idea why the object is not considered as a hot-object and stored in memory?
I have...
minimum_object_size 0 bytes
maximum_object_size 5120 KB
maximum_object_size_in_memory 1024 KB
Earlier we had cache_swap_low and high at 80 and 85% and the physical
memory usage went high leaving only 50MB free out of 15GB.
To fix this issue, the high and low were set to 50 and 55%.
Does this change in "cache_replacement_policy" and the "cache_swap_low
/ high" require a restart or just a -k reconfigure will do it?
Current usage: Top
top - 14:33:39 up 12 days, 21:44, 3 users, load average: 0.03, 0.03, 0.00
Tasks: 83 total, 1 running, 81 sleeping, 1 stopped, 0 zombie
Cpu(s): 0.0%us, 0.1%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.6%st
Mem: 15736360k total, 14175056k used, 1561304k free, 283140k buffers
Swap: 25703960k total, 92k used, 25703868k free, 10692796k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
17442 squid 15 0 1821m 1.8g 14m S 0.3 11.7 4:03.23 squid
#free
total used free shared buffers cached
Mem: 15736360 14175164 1561196 0 283160 10692864
-/+ buffers/cache: 3199140 12537220
Swap: 25703960 92 25703868
Thanks.
On Wed, Sep 22, 2010 at 2:16 PM, Chad Naugle <Chad.Naugle@xxxxxxxxxxx> wrote:
> Perhaps you can try switching to heap GSDF, instead of heap LFUDA. What are also your minimum_object_size versus your _maximum_object_size?
>
> Perhaps you can also try setting the cache_swap_low / high back to default (90 - 95) to see if that will make a difference.
>
> ---------------------------------------------
> Chad E. Naugle
> Tech Support II, x. 7981
> Travel Impressions, Ltd.
>
>
>
>>>> Rajkumar Seenivasan <rkcp613@xxxxxxxxx> 9/22/2010 2:05 PM >>>
> I have the following for replacement policy...
>
> cache_replacement_policy heap LFUDA
> memory_replacement_policy lru
>
> thanks.
>
> On Wed, Sep 22, 2010 at 2:00 PM, Chad Naugle <Chad.Naugle@xxxxxxxxxxx> wrote:
>> What is your cache_replacement_policy directive set to?
>>
>> ---------------------------------------------
>> Chad E. Naugle
>> Tech Support II, x. 7981
>> Travel Impressions, Ltd.
>>
>>
>>
>>>>> Rajkumar Seenivasan <rkcp613@xxxxxxxxx> 9/22/2010 1:55 PM >>>
>> I have a strange issue happening with my squid (v 3.1.8)
>> 2 squid servers with sibling - sibling setup in accel mode.
>>
>> after running the squid for 2 to 3 days, the HIT rate has gone down.
>> from 50% HIT to 34% for TCP and from 34% HIT to 12% for UDP.
>>
>> store.log shows that even fresh requests are NOT getting stored onto
>> disk and getting RELEASED rightaway.
>> This issue is with both squids...
>>
>> store.log entry:
>> 1285176036.341 RELEASE -1 FFFFFFFF 7801460962DF9DCA15DE95562D3997CB
>> 200 1285158415 -1 1285230415 application/x-download -1/279307
>> GET http://....
>> requests have a max-age of 20Hrs.
>>
>> squid.conf:
>> cache_dir aufs /squid/var/cache 20480 16 256
>> cache_mem 1536 MB
>> memory_pools off
>> cache_swap_low 50
>> cache_swap_high 55
>> refresh_pattern . 0 20% 1440
>>
>>
>> filesystem is resizerfs with RAID-0. only 11GB used for the cache.
>>
>> $cat /proc/sys/fs/file-nr
>> 640 0 1525202
>>
>> $ cat /proc/sys/fs/file-max
>> 1525202
>>
>> Any help is highly appreciated.
>>
>> thanks.
>>
>>
>> Travel Impressions made the following annotations
>> -------------------------------------------------------------
>> "This message and any attachments are solely for the intended recipient and may contain confidential or privileged information. If you are not the intended recipient, any disclosure, copying, use, or distribution of the information included in this message and any attachments is prohibited. If you have received this communication in error, please notify us by reply e-mail and immediately and permanently delete this message and any attachments.
>> Thank you."
>>
>
>
> Travel Impressions made the following annotations
> -------------------------------------------------------------
> "This message and any attachments are solely for the intended recipient and may contain confidential or privileged information. If you are not the intended recipient, any disclosure, copying, use, or distribution of the information included in this message and any attachments is prohibited. If you have received this communication in error, please notify us by reply e-mail and immediately and permanently delete this message and any attachments.
> Thank you."
>
Travel Impressions made the following annotations
-------------------------------------------------------------
"This message and any attachments are solely for the intended recipient and may contain confidential or privileged information. If you are not the intended recipient, any disclosure, copying, use, or distribution of the information included in this message and any attachments is prohibited. If you have received this communication in error, please notify us by reply e-mail and immediately and permanently delete this message and any attachments.
Thank you."
