On 07/02/2012 06:28 AM, Jens Dueholm Christensen (JEDC) wrote:
Hi
I'm quite well aware that the "base problem" regarding leap seconds is
not connected to Resin, but to JVM and OS.
However I saw some strange behaviour in the aftermatch, that might be
interesting to clear up.
Normally we run Resin 3.1.12 without any specific configuration for
<stat-service>.
This means a default sample-period of 60 seconds.
Because of this every 59th second this was logged:
[2012-07-01 02:14:59.000][02:14:59.000] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.000][02:14:59.000] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.000][02:14:59.000] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.000][02:14:59.000] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.000][02:14:59.000] StatService[] cpu-load=41.05
... ~26600 lines later
[2012-07-01 02:14:59.999][02:14:59.999] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.999][02:14:59.999] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.999][02:14:59.999] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.999][02:14:59.999] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.999][02:14:59.999] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.999][02:14:59.999] StatService[] cpu-load=41.05
[2012-07-01 02:14:59.999][02:14:59.999] StatService[] cpu-load=41.05
This seemed a bit much to log every 60th second.
I tried to add a <stat-service> section with 10 minute sample-period,
and saw that those ~26600 lines was now only logged every 10th minute.
But still loads more than usual (I would expect just a single line
beeing logged).
Was Resin to blame for this (ie. is there a possible bug around here?)
or was it the JVM and OS?
I'd guess it's related to the JVM/OS issue. In our nightly regressions,
there were some sleep/waits that were stuck before we updated the system.
It's pretty impressive that a 1s change could cause that much chaos. :)
-- Scott
Regards,
*Jens Dueholm Christensen
*Survey IT
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