[jira] [Created] (SOLR-13771) Add -v and -m to ulimit section of reference guide

["Erick Erickson (Jira)" <ji...@apache.org>]

Erick Erickson created SOLR-13771:
-------------------------------------

             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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