[clamav-users] DB update and clamav-milter delay

Joel Esler (jesler) jesler at cisco.com
Tue Sep 29 06:41:42 EDT 2015

Al,  Thanks for brining that up.

Once a minute?  That’s fairly excessive.

Once an hour is appropriate…  Overdoing it, but more appropriate.  Keep in mind that the mirrors are donated to ClamAV and the bandwidth you are consuming is probably fairly heavy.  If everyone did that….

Joel Esler
Manager, Talos Group

On Sep 29, 2015, at 4:09 AM, Al Varnell <alvarnell at mac.com<mailto:alvarnell at mac.com>> wrote:

You are admitting that on a ClamAV mail list?

From the ClamAV Virus Database documentation <http://www.clamav.net/doc/cvd.html>:

• How many times per hour shall I run freshclam?
You can check for database update as often as 4 times per hour provided that you have the following options in freshclam.conf: DNSDatabaseInfo current.cvd.clamav.netDatabaseMirror db.XY.clamav.net<http://db.xy.clamav.net> DatabaseMirror database.clamav.net<http://database.clamav.net>
Replace XY with your country code. If you don’t have that option, then you must stick with 1 check per hour.


On Tue, Sep 29, 2015 at 01:03 AM, Andreas Schulze wrote:

Am 29.09.2015 09:31 schrieb Marco:
With this installation, after every freshclam update session, clamd is
forced to read the DB:

I had a similar issue. I call freshclam once a minute and the db reload generate a significant load.
I fixed it with ithe attached patch.

Help us build a comprehensive ClamAV guide:


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