On Tue, 2014-06-24 at 14:26 +0200, RadhaJayalakshmi wrote: > Here are my observations from the application logs: > 1) Out of 200 sample searches across both collections - 13 requests are slow > (3 slow responses on Collection 1 and 10 slow responses on Collection 2). > > 2) When things run fast - they are really fast (Qtimes of 25 - 100 > milliseconds) - but when things are slow - I can see that the QTime > consistently hovers around the 5 second (or 5000 millisecond mark). I am > seeing responses of the order of 5024, 5094, 5035 ms - as though something > just hung for 5 seconds.
We have a strange recurring pattern where the first search every hour on the hour takes about 4 seconds, where standard response time is 400ms. That is for a single shard Solr server, running in Tomcat. Can you check if your slow response times are at the start of every full hour? > 6) The Solr dashboard is however showing that 0.2% (or 9.8MB) of Swap Space > being consumed on one of the 3 VMs. Is this a concern ? Swap in itself is of no concern. Swapping out unused memory blocks is a feature. As long as the machine rarely accesses the swap file, it is working as intended. - Toke Eskildsen, State and University Library, Denmark
