[squid-users] leaking memory in squid 3.4.8 and 3.4.7.

[Amos Jeffries]

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On 2/10/2014 1:19 a.m., Michele Bergonzoni wrote:
>> I have an external ACL defined as: external_acl_type preauth
>> cache=0 children-max=1 concurrency=100 ttl=0 negative_ttl=0 %SRC
>> %>{User-Agent} %URI %METHOD /usr/sbin/squid-preauth
> 
> It is well known that external ACLs with ttl=0 and cache=0 leak
> RAM: I had this problem and discovered the reason only recently,
> but Amos knows it since 2011:
> 
> https://www.mail-archive.com/squid-dev@squid-cache.org/msg14809.html
>
> 
If you read the next post in that thread you will see the referenced
patch was dropped. IIRC it always produced a non-match result in some
configs.

An updated variant is present in 3.4 which still produces a useful
result in all cases. The leak is probably from that.

> I recently opened a bug about this, that I will update now:
> 
> http://bugs.squid-cache.org/show_bug.cgi?id=4088
> 
> A workaround that we use and may be applicable in your case is to
> use ttl=1 cache=1.
> 

Thank you for the reminder. I will start work on this next.

Amos
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