Hi Shawn,

This gives me a good understanding. However, I think that slowness in start-up 
in my case is due to segmentation. Before restarting my index contains 42 
segments with 30GB. After restarting, index is in one segment with 22GB. So, I 
think that shard unavailability is coming from optimization process which is 
executed when we restart solr.

Is there any option is solr to avoid this implicit optimization on startup?

What I learned from this experience is that we need to do explicit optimization 
in regular period to avoid a huge number of segments. Is it a best practice in 
solr?

Regards,
Nabil.


Le Dimanche 12 octobre 2014 22h03, Shawn Heisey <apa...@elyograg.org> a écrit :
 


On 10/12/2014 12:46 PM, nabil Kouici wrote:

> I'm evaluating solr performance. I've created implicit collection with 2 
> shards in different server. first shard contains 100 million documents 
> (30GB), second contain one million document.When I restart the second solr 
> instance, shard become immediately available. However, when I restart the 
> first solr, shard with 100 million doc take a huge time to be available for 
> search. Is it normal? In Cloud interface, shard is green (Active). My servers 
> have 28GB RAM.
> I'm using default solrconfig.xml. 

Does the following URL describe the problem you're running into?

http://wiki.apache.org/solr/SolrPerformanceProblems#Slow_startup

Thanks,
Shawn

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