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

[Micah Snyder (micasnyd)]

One thing we could do is have clamd "start" before loading the database.  That is to say that it would immediately begin listening on the unix/tcp socket for requests and fork into the background so as not to block the boot process.  All scan requests would then be blocked while the database loads.  I imagine this would solve most of the frustration around boot-up load time. 

Does this have any appeal?

-Micah

On 9/12/19, 11:31 PM, "clamav-users on behalf of J.R. via clamav-users" <clamav-users-bounces at lists.clamav.net on behalf of clamav-users at lists.clamav.net> wrote:

    This patch will be a very welcome addition! Oddly enough today my
    hosting company had an emergency and I needed to shutdown my server so
    it could be physically moved mid-day.
    
    The painfully slow load time of ClamAV was excruciating apparent while
    I was watching the console slowly go through the boot process.
    
    While a second thread to *reload* the database in the background is
    going to be a nice feature, I would assume it wouldn't help any on
    initial startup. While tweaking things with this 2nd thread, maybe
    there could be a start-up option / flag to only load like the
    daily.cld (or official sigs only) to minimize blocking on boot-up, but
    still allow a decent level of protection. Then a full DB could be
    loading up in its separate thread and swapped when ready?
    
    I honestly have no idea how the signatures load, but would a full
    multi-threaded model even theoretically work? Or would that not allow
    correct parsing / loading of the signatures? It just seems with PCs
    and servers having so many cores, and the number of viruses
    ever-increasing...
    
    Alternatively, would there be a way to do a "diff" on the loaded
    signatures in memory to add / remove only the ones that have changed
    (when feasible over a full reload)? Seems like an awful lot of
    unnecessary re-parsing is being done when only a small handful of
    signatures are added at any given time.
    
    Just throwing some ideas out there... Always thankful for all the hard
    work from the development team.
    
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