Shawn Heisey created SOLR-13446:
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Summary: Improve default heap size and related handling
Key: SOLR-13446
URL: https://issues.apache.org/jira/browse/SOLR-13446
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: scripts and tools
Affects Versions: 8.0
Reporter: Shawn Heisey
Solr's scripts have a default max heap setting of 512MB. I think it's fair to
say that for a production install, this is ridiculously small. Nearly everyone
who runs a Solr server will need to increase this value.
I think it would be useful to issue a warning in the log when the heap size is
below a certain value. Text like "Detected max heap size is XXXX. It might be
necessary to increase the heap size for proper operation. See
https://lucene.apache.org/solr/path/to/ref/guide/location for details."
For people who are running very small servers, there should be a config option
to turn off that logging when somebody knows that the default heap size is
perfectly fine for their setup.
At the same time, we also need to improve the default heap size. I'm going to
ask everyone to bikeshed about what the new default should be. Initial thought
is a 2GB default, to be made smaller automatically if detected system memory is
low. If the admin has explicitly set the heap size, then none of this will
take place.
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