Add "free" memory to _astats

apache / trafficcontrol

Apache Traffic Control is an Open Source implementation of a Content Delivery Network

https://trafficcontrol.apache.org/

Apache License 2.0

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Add "free" memory to _astats #7313

Open smalenfant opened 1 year ago

smalenfant commented 1 year ago

This Feature Request affects these Traffic Control components:

Traffic Monitor
Traffic Server astats plugin

Description

We have been running in a condition (which don't know root cause at this time) in which lots of Traffic Server on the CDN has been running into low memory conditions (down 50-60GB within hours) and available memory is exhausted.

Would be nice to have Traffic Monitor making the caches OFFLINE during those conditions to avoid failures

smalenfant commented 1 year ago

In addition, seems like proxy.process.traffic_server.memory.rss": 2787184640 is not representative of the current state of the ATS process memory being used.

USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
ats        3443  147 97.5 412863996 384980056 ? SLl  Jan03 47199:42 /opt/trafficserver/bin/traffic_server...