On 10/24/2013 11:13 AM, Eliezer Croitoru wrote:
> Out of curiosity,
> What squid Digest content is?
> What the Digest rebuild does?
> Let say an ICP\HTCP request can reflect the Information inside the digest?
http://wiki.squid-cache.org/SquidFaq/CacheDigests
Alex.
> On 10/24/2013 07:54 PM, Alex Rousskov wrote:
>> On 10/24/2013 07:43 AM, Omid Kosari wrote:
>>
>>> "digest_generation off" temporary solved problem but needs restart .
>>> I have
>>> tested with reload before .
>>
>> Sounds like you have detected the source of the blocking Squid problem
>> and confirmed it! The fact that digest generation makes your Squid
>> unresponsive is essentially a Squid bug, but you might be able to help
>> Squid by adjusting its configuration. If you want to try it, I suggest
>> re-enabling digest generation and setting
>> digest_rebuild_chunk_percentage to 1.
>>
>> If that works around your problem, great. Unfortunately, I suspect Squid
>> may still be unresponsive during digest generation time because of how
>> regeneration steps are scheduled and/or because of an old bug in the
>> low-level scheduling code of "heavy" events. However, using the minimum
>> digest_rebuild_chunk_percentage value (1) is still worth trying.
>>
>>
>>> But i could not use digest benefits anymore . Is there big penalty
>>> if both
>>> caches are in same gigabit switch ?
>>
>> The digest optimization can be significant if the two Squids share a lot
>> of popular content _and_ it takes a long time for each Squid to get that
>> content from the internet during a miss.
>>
>>
>> HTH,
>>
>> Alex.
>>
Received on Thu Oct 24 2013 - 22:22:55 MDT
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