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

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

     [ https://issues.apache.org/jira/browse/SOLR-13771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Erick Erickson reassigned SOLR-13771:
-------------------------------------

    Assignee: Erick Erickson

> 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
>            Assignee: Erick Erickson
>            Priority: Major
>
> 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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