Erick Erickson created SOLR-13771:
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Summary: Add -v and -m to ulimit section of reference guide
Key: SOLR-13771
URL: https://issues.apache.org/jira/browse/SOLR-13771
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Erick Erickson
I just noticed these bits in MMapDirectory.java
{code}
if (!Constants.JRE_IS_64BIT) {
moreInfo = "MMapDirectory should only be used on 64bit platforms, because
the address space on 32bit operating systems is too small. ";
} else if (Constants.WINDOWS) {
moreInfo = "Windows is unfortunately very limited on virtual address
space. If your index size is several hundred Gigabytes, consider changing to
Linux. ";
} else if (Constants.LINUX) {
moreInfo = "Please review 'ulimit -v', 'ulimit -m' (both should return
'unlimited'), and 'sysctl vm.max_map_count'. ";
} else {
moreInfo = "Please review 'ulimit -v', 'ulimit -m' (both should return
'unlimited'). ";
}
{code}
We should add this info to the ref guide, particularly the bits about -v and
-m. We already mention ulimits, but only in relation to file handles and
processes.
What about restructuring that section a bit, to something like "operating
system settings", so we can include some of the information above.
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