I will be looking into JConsole. One more question regarding caching. When we talk about warm-up queries does that mean that some of the complex queries (esp those which require high I/O e.g. phrase queries) will really be very slow (on lets say an index of 200GB) if they are not cached? I am talking about difference of more than few seconds...
Also regarding the cache settings I wanted to get another advice when you talk about evictions do you mean the cumulative or current? I know ideally the hit rate should be high and evictions low but can you please look into the below stats for documentCache of both indexes and see what is it really 'saying'. Should the size be increased/decreases/kept same or this data is not enough to judge and should collect at least few days data? Note: Tomcat was restarted a day back and as I said there isn't much workload but complex queries and index is updated every hour (currently haven't implemented replication). Max Size and InitialSize for both is 4096 lookups : 9849 hits : 5144 hitratio : 0.52 inserts : 4705 evictions : 609 size : 4096 warmupTime : 0 cumulative_lookups : 82492 cumulative_hits : 52059 cumulative_hitratio : 0.63 cumulative_inserts : 30433 cumulative_evictions : 685 -------------------------- lookups : 5539 hits : 3765 hitratio : 0.67 inserts : 1774 evictions : 0 size : 1774 warmupTime : 0 cumulative_lookups : 29062 cumulative_hits : 20568 cumulative_hitratio : 0.70 cumulative_inserts : 8494 cumulative_evictions : 0 On Wed, Jan 19, 2011 at 11:48 PM, Markus Jelsma <markus.jel...@openindex.io>wrote: > You only need so much for Solr so it can do its thing. Faceting can take > quite > some memory on a large index but sorting can be a really big RAM consumer. > > As Erick pointed out, inspect and tune the cache settings and adjust RAM > allocated to the JVM if required. Using tools like JConsole you can monitor > various things via JMX including RAM consumption. > > > Hi, > > > > I know this is a subjective topic but from what I have read it seems more > > RAM should be spared for OS caching and much less for SOLR/Tomcat even on > a > > dedicated SOLR server. > > > > Can someone give me an idea about the theoretically ideal proportion b/w > > them for a dedicated Windows server with 32GB RAM? Also the index is > > updated every hour. > -- Regards, Salman Akram
