Shawn, By using jps command double check the parms used to start solr, i found that the max heap size already set to 10G. So I made a big mistake yesterday.
But by using solr admin UI, I select the collection with performance problem, in the overview page I find that the heap memory is about 8M. What is wrong. Every time I search difference characters, QTime from response header always greater than 300ms. If I search again, cause i can hit cache, the response time could become to about 30ms. -- 发自我的网易邮箱手机智能版 在 2016-05-10 11:35:27，"Shawn Heisey" <apa...@elyograg.org> 写道： >On 5/9/2016 9:11 PM, lltvw wrote: >> You are right, the max heap is 512MB, thanks. > >90 million documents split into 12 shards means 7.5 million documents >per shard. > >With that many documents and a 512MB heap, you're VERY lucky if Solr >doesn't experience OutOfMemoryError problems -- which will make Solr's >behavior very unpredictable. > >Your server has plenty of memory. Because of the very small max heap, >it is probably spending a lot of time doing garbage collection. You'll >actually need to *increase* your heap size. I would recommend starting >with 4GB. > >Exactly how to do this will depend on how you're starting it. If you >are starting it with "bin/solr" then you can add a -m 4g option to that >commandline. > >Thanks, >Shawn >
