laforge has submitted this change. ( https://gerrit.osmocom.org/c/osmo-mgw/+/35178?usp=email ) Change subject: systemd,manual: set LimitNOFILE=65536 ...................................................................... systemd,manual: set LimitNOFILE=65536 A typical OS imposed limit is 1024 open FD, which can bee too low when there are hundreds of concurrent voice calls. In systemd service file, set a super high limit of 65536. In osmo-mgw's user manual, add section 'Configure limits' describing this in detail. Related: OS#6256 Related: osmo-bsc I26c4058484b11ff1d035a919bf88824c3af14e71 Change-Id: I46512517bc3b5bb90cac7643e7ac73afba398d36 --- M contrib/systemd/osmo-mgw.service M doc/manuals/chapters/running.adoc 2 files changed, 37 insertions(+), 0 deletions(-) Approvals: fixeria: Looks good to me, but someone else must approve laforge: Looks good to me, approved Jenkins Builder: Verified pespin: Looks good to me, approved diff --git a/contrib/systemd/osmo-mgw.service b/contrib/systemd/osmo-mgw.service index b187e1a..03f40ff 100644 --- a/contrib/systemd/osmo-mgw.service +++ b/contrib/systemd/osmo-mgw.service @@ -5,6 +5,7 @@ [Service] Type=simple +LimitNOFILE=65536 StateDirectory=osmocom WorkingDirectory=%S/osmocom Restart=always diff --git a/doc/manuals/chapters/running.adoc b/doc/manuals/chapters/running.adoc index c178e31..e3bab4d 100644 --- a/doc/manuals/chapters/running.adoc +++ b/doc/manuals/chapters/running.adoc @@ -23,3 +23,20 @@ Disable colors for logging to stderr. This has mostly been deprecated by VTY based logging configuration, see <<logging>> for more information. + + +=== Configure limits + +When servicing hundreds of media endpoints, it may be necessary to adjust the +operating system's limit on open file descriptors for the osmo-mgw process. A +typical default limit imposed by operating systems is 1024; this would be +exceeded by, for example, about 256 active voice calls with 4 RTP/RTPC ports +each, sockets for other interfaces not considered yet. + +It should be ok to set an OS limit on open file descriptors as high as 65536 +for osmo-mgw, which practically rules out failure from running out of file +descriptors anywhere (<16,000 active calls). + +When using systemd, the file descriptor limit may be adjusted in the service +file by the `LimitNOFILE` setting ("Number of Open FILE descriptors"). OsmoMGW +ships a systemd service file with a high LimitNOFILE setting. -- To view, visit https://gerrit.osmocom.org/c/osmo-mgw/+/35178?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-mgw Gerrit-Branch: master Gerrit-Change-Id: I46512517bc3b5bb90cac7643e7ac73afba398d36 Gerrit-Change-Number: 35178 Gerrit-PatchSet: 2 Gerrit-Owner: neels <nhofmeyr@sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy@sysmocom.de> Gerrit-Reviewer: laforge <laforge@osmocom.org> Gerrit-Reviewer: pespin <pespin@sysmocom.de> Gerrit-MessageType: merged