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Issue - Linux file limits

FeatureBase Community may exceed open file limits because:

  • the database may be split into a large number of files
  • these files may be open simultaneously.

Possible cause

Maximum file limits may be set incorrectly:

  • in featurebase.conf
  • for the current session
  • for persistent sessions

FeatureBase recommends a minimum of 256K for open file limits on Linux systems.


Alter the FeatureBase max-file-count limit

Alter ulimit for current session

ulimit affects only the current shell and its child processes. You may need to launch a new shell as root to raise the ulimit to an appropriate value.

  • Open a CLI then run this command with an appropriate value:
ulimit -n <value>
  • Verify the change:
ulimit -n

Set a persistent open file limit value

There are four ways to change the open file limit so it persists after reboot.

  • Open a CLI then edit one or all the following files:
Edit Parameter to set
/etc/security/limits.conf nofile
/etc/security/limits.d/<username>.conf nofile
/etc/susctl.conf fs.file-max and/or vm.max_map_count
/etc/sysctl.d/*.conf fs.file-max
  • Restart your session for the change to take effect.

Further information