Andreas Mock wrote:
Hi all,
after many days without dopey questions from me I'm back: ;-)
All questions concerning HAv2 (2.1.2-x).
Is the resource agent action 'monitor' done with a higher
OS process priority?
I'm asking about that, because we had the following phenomena:
1) (Very) High load on server
2) Monitor action initiated
3) Monitor action timed out because of high load
4) Stopping of resource initiated because of resource failover
5) Stop action timed out
6) Stonith of node
Conclusion: Monitoring which is a nice feature can bring all
services on that node down if the server is doing what it has to do:
Working hard.
Our solution: (Very) long timeout values for monitoring actions.
Is this the only solution? Would it be feasible to let the monitor
action of the RA run with higher priority? Have I forgot something?
I believe that you have hit on the only really good general solution.
Raising the priority won't raise I/O priority or make the monitor and
stop actions stay locked in memory so that they don't get paged in or
out behind a huge I/O queue.
--
Alan Robertson <[EMAIL PROTECTED]>
"Openness is the foundation and preservative of friendship... Let me
claim from you at all times your undisguised opinions." - William
Wilberforce
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