[clamav-users] How to boost clamav? Reloading database results in a talking timeout?

Reio Remma reio at mrstuudio.ee
Thu Oct 31 06:04:05 EDT 2019


On 28/10/2019 12:55, Reio Remma via clamav-users wrote:
> On 14/09/2019 17:34, G.W. Haywood via clamav-users wrote:
>> Hi Micah,
>>
>> On Fri, 13 Sep 2019, Micah Snyder (micasnyd) wrote:
>>
>>> I'm sorry, Ged...
>>
>> Apology accepted. :)
>>
>> I'm now running the development (0.102) version of clamd, patched with
>> Mr. Wu's patch, alongside two version 101.4 clamd daemons (an unpatched
>> one, and one with the patch that I posted on Bugzilla).
>>
>> The milter scans all mail with all three daemons.  On the arrival of a
>> message, if the database is not already being reloaded I start a fresh
>> reload before the scan so that, for all scans, a reload always executes
>> concurrently.  Nothing seems to have broken, and so far there's nothing
>> terribly interesting to report other than the strange failure to detect
>> which I sent to Joel early this week (and which I'm sure has nothing to
>> do with these patches). 
>
> I've been running a patched 101.4 for a few weeks now and 
> unfortunately I'm observing a memory leak from the multithreaded 
> database reloads.
>
> I'm observing clamd memory usage going up when the new database loads 
> and then eventually dropping down to 1.3G again. For some reason 
> "eventually" means the memory usage drops down only after clamd 
> processes the next e-mail.
>
> The problem however shows itself if clamd happens to reload its 
> database 2 times if a row with no mail processed in between. Seemingly 
> it will have 3 databases in memory then and the next mail being 
> processed releases one of them, but the extra database will remain 
> "somewhere".
>
> All sorts of weird problems always keep popping up on due to low 
> traffic on the server. :) 

Fortunately 0.102.0 with the patch from ClamAV team doesn't have that 
issue and seems to release the extra memory right away.

Happily running 0.102.0 now.

Good luck,
Reio


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