On Thu, 2005-03-17 at 09:11 -0500, Baker, Darryl wrote:
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Finally got all the problems fix. First I installed the latest snap
shot and the load dropped. We had some scripts using ssh that were
setting up X window tunnels for no reason. We fixed those scripts and
the load dropped. I switched the configuration to "schedule = (
Min00_05 Min30_35 )" but left the rules saying Q1 and Q3. Nothing
changed. Then I had an inspiration and removed /var/cfengine/*db. The
load and the contention for the mutex dropped like a rock. Why?
We believe that the main problem was that the kernel mutex we were
spinning on is part of /dev/random and that between all the ssh
clients this machine spawns and the cfengine connections that it was
just now being able to generate enough randomness and was blocking.
Then why would removing those files improve things
This is almost certainly an internal roblem in berkeley DB, probably
caused by having mixed versions or upgrades on your system. Sleepycat
change internals quite often and that causes problems in compatability.
That is why deleting the file with incorrect format will cure the
problem. It will then not be incompatible.
M
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