mizayah [miza...@gmail.com] wrote: > What i see is that after restart jvm usage is realy low and raise slowly > while system cpu ussage is high. > My select queries are realy slow during that time.
The first searches tend to be slow while Solr fills internal caches and the OS file cache is warmed. > After few days when jvm grab some MORE memory system drops down. > java settings > -Xmx6144m -XX:+UseConcMarkSweepGC -XX:+PrintGC -XX:+PrintGCDetails > I have 8GB ram I am guessing you are using spinning drives? You have 8GM RAM in your machine. Let's say your JVM uses 3GB at the beginning and the rest of your system 1GB. That leaves 4GB for disk cache. When the JVM grabs more memory and increases the heap, let's say to 5GB, that leaves only 2GB for disk cache. As Solr needs fast I/O, either in the form of fast storage or enough free memory for OS file cache, your performance goes down. Possible solutions: 1) Set Xmx as low as practically possible, leaving as much memory as possible for file cache 2) Put more RAM in the machine 3) Switch to SSD How large is your index? - Toke Eskildsen
