> I try to monitor apache solr, because solr often over heap and status > collection solr be "down". How to monitor apache solr ?? > is there any tools for monitoring solr or how ??
The easiest way is to use the Solr ping feature: https://cwiki.apache.org/confluence/display/solr/Ping It will quickly and reliable tell you if Solr is still alive. There is also a status call: /solr/admin/info/system?wt=json which can tell you how much free memory you have left. - Bram
