Thanks for your research and reaching out on this, Ron. If you would like, you can open a Jira to incorporate this information in the docs here [1], or just reply here that you’re not interested and one of our community members will take this task.
[1] https://issues.apache.org/jira/secure/CreateIssue!default.jspa <https://issues.apache.org/jira/secure/CreateIssue!default.jspa> Andy LoPresto [email protected] [email protected] PGP Fingerprint: 70EC B3E5 98A6 5A3F D3C4 BACE 3C6E F65B 2F7D EF69 > On Jul 25, 2018, at 3:29 PM, Ron Isaacson <[email protected]> wrote: > > Hello, > > Looking at the System Administrator’s Guide > <https://nifi.apache.org/docs/nifi-docs/html/administration-guide.html>, I > see that you recommend setting vm.swappiness = 0 in /etc/sysctl.conf. This > is fine in most cases, but must be avoided on RHEL 6.4 through 6.7. > > On RedHat kernels pre-2.6.32-642, there's a bug which can cause the OOM > killer to aggressively kill processes even when RAM is still available and > swap is unused. See this RedHat article > <https://access.redhat.com/solutions/1149413> for more information. (A > RedHat support login is required; if you don't have one, please contact me > off-list.) > > I kindly recommend you add a note to your docs advising users not to apply > this setting on affected kernels. Thank you! > > - Ron
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