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From Emir Arnautović <emir.arnauto...@sematext.com>
Subject Re: solr 5.4.1 - updates/inserts suddenly very slow. Search still fast
Date Wed, 18 Apr 2018 15:11:18 GMT
Hi Felix,
Did you try to do thread dump while doing update. Did it show anything?

Emir
--
Monitoring - Log Management - Alerting - Anomaly Detection
Solr & Elasticsearch Consulting Support Training - http://sematext.com/



> On 18 Apr 2018, at 17:06, Felix XY <felix.xy.xy.xy@gmail.com> wrote:
> 
> Hello group,
> 
> since two days we have huge problems with our solr 5.4.1 installation.
> 
> ( yes, we have to update it. But this will not be a solution right now )
> 
> All path=/select requests are still very fast. But all /update Requests
> take >30sec up to 3 minutes.
> 
> The index is not very big (1.000.000 documents) and its size on disk is
> about 1GB
> 
> The virtual server (ESX) has 8GB RAM and 8 cores. IO is good.
> 
> solr was started with -Xms4096M -Xmx4096M
> ( but we changed it to higher and lower values during our tests )
> 
> We have a lot of /select requests at the moment (10.000/Minute) but this is
> not unusual for this installation and we didn't have this update problems
> before.
> 
> On another identical sleeping core on the same server, we are able to make
> fast updates. We experience slow updates only on the core with high
> selecting traffic. So it seems not to be a general problem with java, GC,
> ....
> 
> We disabled all other insert/updates and we are able to reproduce this slow
> update behaviour in the Solr Admin console with a single update of one
> document.
> 
> We are lost.
> 
> We didn't change the Solr configuration.
> The load seems to be not higher then during previous peaks
> The developers didn't change anything (so they say)
> Search is still fast.
> 
> But single simple updates takes >30sec....
> 
> Any ideas about this? We tried quite a lot the last two days....
> 
> Cheers
> Felix


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