Re: [squid-users] squid performance tunning

From: Amos Jeffries <>
Date: Fri, 19 Aug 2011 01:12:57 +1200

On 18/08/11 22:53, Kaiwang Chen wrote:
> 2011/8/18 Amos Jeffries<>:
>> On 18/08/11 19:40, Drunkard Zhang wrote:
>>> 2011/8/18 Chen Bangzhong:
>>>> I don't know why there are so many disk writes and there are so many
>>>> objects on disk.
>> All traffic goes through either RAM cache or if its bigger than
>> maximum_object_size_in_memory will go through disks.
>> From that info report ~60% of your traffic bytes are MISS responses. A large
>> portion of that MISS traffic is likely not storable, so will be written to
>> cache then discarded immediately. Squid is overall mostly-write with its
>> disk behaviour.
> Will a "cache deny" matching those non-storable objects suppress
> storing them to disk?
> And HTTP header 'Cache-Control: no-store' ?

"no-store" header and "cache deny" directive have the same effect on
your Squid. Both erase existing stored objects and erase the newely
received one _after_ it is finished transfer.

  The difference is that the header applies everywhere receiving the
object. The cache access control is limited to that one Squid instance
testing it.


Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.14
   Beta testers wanted for
Received on Thu Aug 18 2011 - 13:13:02 MDT

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