lucene-solr-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alexandre Rafalovitch <>
Subject Re: What is the bottleneck for an optimise operation?
Date Thu, 02 Mar 2017 15:13:35 GMT
Optimize operation is no longer recommended for Solr, as the
background merges got a lot smarter.

It is an extremely expensive operation that can require up to 3-times
amount of disk during the processing.

This is not to say yours is a valid question, which I am leaving to
others to respond.

---- - Resources for Solr users, new and experienced

On 2 March 2017 at 10:04, Caruana, Matthew <> wrote:
> I’m currently performing an optimise operation on a ~190GB index with about 4 million
documents. The process has been running for hours.
> This is surprising, because the machine is an EC2 r4.xlarge with four cores and 30GB
of RAM, 24GB of which is allocated to the JVM.
> The load average has been steady at about 1.3. Memory usage is 25% or less the whole
time. iostat reports ~6% util.
> What gives?
> Running Solr 6.4.1.

View raw message