I have server with 32Gb RAM under Windows Server 2012 R2 Standard.
I have installed on server:
- ES 1.6.0 - takes 8Gb of RAM, configured as single node.
- MS SQL Server 2008R2 - takes 16Gb of RAM.
When I just started ES - all is fine, works without any timeouts.
But after 3-4 days I'm starting get timeouts during different ES operations (search, msearch, bulk insert).
During getting timeouts BigDesk shows that do not exist any problems with HeapMemory (~5-6 Gb out of 8Gb is used), CPU (cpu usage ~30-40%), Search requests per second ( 50-80 requests per second).
I turned on slow logging and noticed that number of records in elasticsearch_index_search_slowlog.* files usually grows day by day and some queries are executed in 1-2 minutes.
The volume of indexed documents is the same in 3-4 days approximately, so I do not think that it could be a reason.
If I restart ES - it helps, but situation is repeated in 3-4 days.
Any hints what could it be?
On what should I pay attention in order to recognize possible problems?