[Koha] [Extern] - Koha Slow Sometimes

[Michael Kuhn]

Hi Mona

Sorry for not answering through the list. You wrote:

 > Okay thanks for the links. That could be... The timeframe when it got
 > slow also matches up with when we started having problems.
 > What makes me a bit hesitant to say it is really this is that in the
 > CPU monitoring it never is fully used..
 > What exactly should I look for in this log file to verify whether it
 > is really this problem?

I suggest you look for the bots that identify like

grep '[Bb]ot\|[Cc]rawler]' plack.log

which will maybe let you find lines containing names of bots like 
AdsBot-Google, ahrefs, AliyunSecBot, Amazonbot, applebot, 
archive.org_bot, AwarioBot etc. etc.

Besides there may be many more lines by bots that don't identify and 
which are not identifiable by the above approach. For example it is very 
suspicious if you see several searches per second all from different Ip 
addresses. For such cases I'd suggest to use Anubis oder Cloudflare (as 
you already do).

 > We are already using Cloudflare so changing the settings there could
 > be helpful.

I don't know about Cloudflare since on the hosts I manage I was able to 
solve the problem using Apache directives (RewriteCond 
%{HTTP_USER_AGENT}) blocking at least the bots which identify.On my own 
demo installation I was able to install Anubis.

Best wishes: Michael
-- 
Geschäftsführer · Diplombibliothekar BBS, Informatiker eidg. Fachausweis
Admin Kuhn GmbH · Pappelstrasse 20 · 4123 Allschwil · Schweiz
T 0041 (0)61 261 55 61 · E mik at adminkuhn.ch · W www.adminkuhn.ch



Am 25.07.25 um 21:10 schrieb Mona Panchaud:
> Hello Michael,
> 
> We are currently running into the problem again that it is very slow, also on the newer version.
> 
> In the server information page on the koha admin panel I see the following information:
> "Memcached:    Servers: 127.0.0.1:11211 | Namespace: koha_bibliothek | Status: running. | Config read from: koha-conf.xml"
> So I assume Memcached is working correctly? Is there something else that I would need to check to see whether it is working correctly?
> 
> Are there any other options for making it faster?
> 
> Thanks in advance!
> 
> Kind regards,
> Mona
> On 25 Jul 2025 at 10:40 +0200, Stolarski, Michael <michael.stolarski at dkfz-heidelberg.de>, wrote:
> 
>> Hello Mona,
>>
>> have you checked if the Memcached feature is enabled?
>> This feature can improve the performance of Koha.
>>
>> Best Regards
>> Michael
>>
>>
>> Michael Stolarski
>> AG Desktop-Services / IT-Service
>> IT Core Facility (W310) / Bibliothek (W510)
>>
>> Deutsches Krebsforschungszentrum
>> Stiftung des öffentlichen Rechts
>> Im Neuenheimer Feld 280
>> 69120 Heidelberg
>> Tel: +49 6221 42 3658
>> Tel: +49 6221 42 2376 (Servicezentrum)
>>
>> michael.stolarski at dkfz-heidelberg.de
>> www.dkfz.de
>>
>>
>>
>> Vorstand: Prof. Dr. med. Dr. h. c. Michael Baumann, Ursula Weyrich
>> USt-ID: DE143293537
>>
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Koha <koha-bounces at lists.katipo.co.nz> Im Auftrag von Mona Panchaud
>> Gesendet: Donnerstag, 24. Juli 2025 20:14
>> An: koha at lists.katipo.co.nz
>> Betreff: [Extern] - [Koha] Koha Slow Sometimes
>>
>> Hello,
>>
>> We have recently observed that our Koha installation is sometimes extremely slow and we ran into timeouts from Cloudflare. In the logs we were not able to see anything suspicious.
>> Our server is also not fully maxed out in CPU/RAM.
>>
>> We have this week upgraded from 24.05 to 24.11 and hope that it will be better.
>> Are there any other steps we can take to improve the performance?
>>
>> All the best,
>> Mona
>> _______________________________________________
>>
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>>
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