Hi!
I have been looking for a while for some way to monitor all the processes
of a server, to be able to say in a particular moment which one is
consuming the CPU, memory, etc.
Until now, the only solution I have found is pydstat (
https://github.com/SplunkStorm/pydstat) + splunk.
When is executed, pydstat send to syslog one line per process, with cpu,
mem and io info.
Then, splunk read that logfile and generate timecharts (example
search: source="pydstat.log" | timechart span=4m avg(pct_CPU) by Command).
This works great, but splunk is quite expensive, and a little "using a
hammer to crack a nut".
Logstash seems that could works in the same way, but I haven't proved it
yet, I have to finish the grok expr to parse the data, and don't know if it
will generate graphs as good as splunk.
Looking for other options I think in Graphite.
The first idea was pydstat + logster + graphite. I think it could work, but
I thought that must be an easier way (at least with less components).
Looking in the graphite tools section I see collectl. Monitoring processes
and connection to graphite, perfect!
So my first try was:
collectl --export graphite,192.168.1.113,d=9 -sZ -i 2:2
But nothing happens.
Looking at the graphite code I have seen that there is no section for
processes subsystem.
I was thinking in how hard could be to write that part of code.
My first idea is send data like:
process.<CMD>.<PID>.cpu
process.<CMD>.<PID>.sys
...
process.<CMD>.cpu
process.<CMD>.sys
...
The idea is to have the data for each pid, but also aggregated for command,
because I think is more interesting knowing the consumption of apache as
one program.
Some problems that I see:
-what happen when the process is runned by an interpreter (python blabla,
python bleble, aggregated together?? no!)
-threads?
-aggregate info in collectl or in graphite (aggregation-rules.conf) ?
Opinions? :)
Regards!
Adrián
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