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From Jörn Franke <jornfra...@gmail.com>
Subject Re: Throughput does not increase in spite of low CPU usage
Date Tue, 01 Oct 2019 05:59:17 GMT
Why do you need 1000 qps?


> Am 30.09.2019 um 07:45 schrieb Yasufumi Mizoguchi <yasufumi0410@gmail.com>:
> 
> Hi,
> 
> I am trying some tests to confirm if single Solr instance can perform over
> 1000 queries per second(!).
> 
> But now, although CPU usage is 40% or so and iowait is almost 0%,
> throughput does not increase over 60 queries per second.
> 
> I think there are some bottlenecks around Kernel, JVM, or Solr settings.
> 
> The values we already checked and configured are followings.
> 
> * Kernel:
> file descriptor
> net.ipv4.tcp_max_syn_backlog
> net.ipv4.tcp_syncookies
> net.core.somaxconn
> net.core.rmem_max
> net.core.wmem_max
> net.ipv4.tcp_rmem
> net.ipv4.tcp_wmem
> 
> * JVM:
> Heap [ -> 32GB]
> G1GC settings
> 
> * Solr:
> (Jetty) MaxThreads [ -> 20000]
> 
> 
> And the other info is as follows.
> 
> CPU : 16 cores
> RAM : 128 GB
> Disk : SSD 500GB
> NIC : 10Gbps(maybe)
> OS : Ubuntu 14.04
> JVM : OpenJDK 1.8.0u191
> Solr : 6.2.1
> Index size : about 60GB
> 
> Any insights will be appreciated.
> 
> Thanks and regards,
> Yasufumi.

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