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https://issues.apache.org/jira/browse/LUCENE-3667?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-3667:
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Attachment: LUCENE-3667.patch
updated patch, with a timeout on the ContentStreamTest so it doesnt hang
forever if svn.apache.org is down, and fixing test fsync slowness issues by
using LuceneTestCase.newDirectory() in solr tests (on local runs this uses
ramdirectory 95% of the time, fsdirectory other times, in hudson it uses
fsdirectory more often).
> Consider changing how we set the number of threads to use to run tests.
> -----------------------------------------------------------------------
>
> Key: LUCENE-3667
> URL: https://issues.apache.org/jira/browse/LUCENE-3667
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Mark Miller
> Assignee: Mark Miller
> Priority: Minor
> Attachments: LUCENE-3667.patch, LUCENE-3667.patch, LUCENE-3667.patch,
> LUCENE-3667.patch
>
>
> The current way we set the number of threads to use is not expressive enough
> for some systems. My quad core with hyper threading is recognized as 8 CPUs -
> since I can only override the number of threads to use per core, 8 is as low
> as I can go. 8 threads can be problematic for me - just the amount of RAM
> used sometimes can toss me into heavy paging because I only have 8 GB of RAM
> - the heavy paging can cause my whole system to come to a crawl. Without
> hacking the build, I don't think I have a lot of workarounds.
> I'd like to propose that switch from using threadsPerProcessor to
> threadCount. In some ways, it's not as nice, because it does not try to scale
> automatically per system. But that auto scaling is often not ideal (hyper
> threading, wanting to be able to do other work at the same time), so perhaps
> we just default to 1 or 2 threads and devs can override individually?
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