[SOLR-13771] Add -v and -m to ulimit section of reference guide and bin/solr checks

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 8.3
• Assignee: Erick Erickson
• Reporter: Erick Erickson
• Created: 17/Sep/19 14:29
• Updated: 21/Jan/20 17:00
• Resolved: 30/Sep/19 22:03

Description

I just noticed these bits in MMapDirectory.java

    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'). ";
    }

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.