Hello,
I use PCP-2.2.2-132 to remotly monitor a linux system.
I sometimes face a strange problem: between two acquisitions, the consumed cpu
time is higher than the real time ! Once turned into a percentage, the
resulting value can reach up to 250% of cpu load !
This case occurs for kernel.cpu.* metrics and with disk.all.avactive metric as
well (both from linux pmda).
I need to understand the root causes of such a behaviour.
Is it due to pmcd, pmda on monitored machine ? or pmcd, pmlogger on remote
monitor ?
Can I conclude than the consumption reached a peak, or could it just be a pmda
failure when updating a metric, trying to read a /proc/ file ?
Where can I find information about this ?
Thank you.
Cordially,
Nicolas GUILLIER
In-Flight and Ground Information Systems
Software Integration - AIRBUS
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