[clamav-users] Scan very slow

Micah Snyder (micasnyd) micasnyd at cisco.com
Mon Mar 25 11:45:02 EDT 2019

Hi Mark, all:

I’m disappointed to hear that it is still slow for you.

We found that the target-type of signatures used for PhishTank.Phishing signatures were causing a significant slowdown.   We have dropped them as of this past Saturday ( https://lists.gt.net/clamav/virusdb/75279 ) and in the last two updates have been re-adding them with more specific scan target types.  We’re now investigating some other optimizations we can make for the next major ClamAV release to improve scan times but at present we don’t have any other leads for signatures that may be slowing down scans.


From: clamav-users <clamav-users-bounces at lists.clamav.net> on behalf of Mark Allan via clamav-users <clamav-users at lists.clamav.net>
Reply-To: ClamAV users ML <clamav-users at lists.clamav.net>
Date: Monday, March 25, 2019 at 9:37 AM
To: ClamAV users ML <clamav-users at lists.clamav.net>
Cc: Mark Allan <markjallan at gmail.com>
Subject: Re: [clamav-users] Scan very slow

Cheers Steve,

In the interest of completeness, here's the scan from today (TXT from DNS: 0.101.1:58:25399:1553509741:1:63:48528:328) showing a marked improvement in scan time, although at 6m 7s it's still almost twice what it used to be.


On Mon, 25 Mar 2019 at 12:56, Steve Basford <steveb_clamav at sanesecurity.com<mailto:steveb_clamav at sanesecurity.com>> wrote:
On 2019-03-25 10:52, Mark Allan via clamav-users wrote:
> Hi all,
> Hopefully this helps someone to narrow things down a bit.
> Mark

18/3/19         10m 49s         TXT from DNS:
0.101.1:58:25392:1552904941:1:63:48507:328      ***

Here's the changes for the above update:


You can also check sigs quickly per update:



Twitter: @sanesecurity


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