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From Walter Underwood <>
Subject Re: Solr performance on EC2 linux
Date Tue, 02 May 2017 01:28:23 GMT
Might want to measure the single CPU performance of your EC2 instance. The last time I checked,
my MacBook was twice as fast as the EC2 instance I was using.

Walter Underwood  (my blog)

> On May 1, 2017, at 6:24 PM, Chris Hostetter <> wrote:
> : tldr: Recently, I tried moving an existing solrcloud configuration from 
> : a local datacenter to EC2. Performance was roughly 1/10th what I’d 
> : expected, until I applied a bunch of linux tweaks.
> How many total nodes in your cluster?  How many of them running ZooKeeper?
> Did you observe the heavy increase in system time CPU usage on all nodes, 
> or just the ones running zookeeper?
> I ask because if your speculation is correct and it is an issue of 
> clocksource, then perhaps ZK is where the majority of those system calls 
> are happening, and perhaps that's why you didn't see any similar heavy 
> system CPU load in ES?  
> (Then again: at the lowest levels "lucene" really shouldn't care about 
> anything clock related at all Any "time" realted code would live in the 
> Solr level ... hmmm.)
> -Hoss

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