./pt-summary: line 2262: STATUS_THP_SYSTEM: unbound variable

[Marcelo Altmann]

pt-summary will report unbound variable on RHEL type of systems:

./pt-summary: line 2262: STATUS_THP_SYSTEM: unbound variable

report_transparent_huge_pages () {

  if [ -f /sys/kernel/mm/transparent_hugepage/enabled ]; then
    CONTENT_TRANSHP=$(</sys/kernel/mm/transparent_hugepage/enabled)
    STATUS_THP_SYSTEM=$(echo $CONTENT_TRANSHP | grep -cv '\[never\]')
  fi
  if [ $STATUS_THP_SYSTEM = 0 ]; then
    echo "Transparent huge pages are currently disabled on the system."
  else
    echo "Transparent huge pages are enabled."
  fi

}

Above function will test if /sys/kernel/mm/transparent_hugepage/enabled exists. If it does, it will initiate CONTENT_TRANSHP and STATUS_THP_SYSTEM, then outside the if it will test it. On RHEL, THP is reported as /sys/kernel/mm/redhat_transparent_hugepage/enabled

[Marcelo Altmann (marcelo.altmann)]

I created a fix for this issue https://github.com/percona/percona-toolkit/pull/159

[Carlos Salguero (carlos-salguero)]

Thanks for the fix. It is already merged in the 2.2 branch

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PT-724