Re: [Wrapper-user] Performance issues

[Hubert F. <hub...@ab...>]

Hi,

Hmm, I tried this with YourKit Java Profiler and didn't notice anything
remarkable. I suppose you talk about WrapperActionServer.java. Looking
at the code I saw, that the regarding section you mentioned, is called
with a timeout of 15 seconds. A command to read consists of just one
byte. A cannot see why this thread should generate much CPU utilisation
neither could my profiler.

Regards
hub





>>> "Vinod Panicker" <vi...@gm...> 14.02.2007 07:21 >>>
Hi,

I'm using wrapper to manage startup and shutdown of a custom server.
During performance testing of the server, the profiler reports a lot
of cpu utilization in the wrapper methods.

To reduce the wrapper communication, I've set the following values in
wrapper.conf -

wrapper.ping.timeout=0
wrapper.ping.interval=3600
wrapper.cpu.timeout=3600

I know that its not advisable, but this was done to reduce the cpu
utilization reported by the profiler.

But inspite of this, the profiler reports that
SocketInputStream.read() called by wrapper is taking a lot of cpu
time.  On reviewing the code, I found that there's a loop that reads
byte by byte from the wrapper socket.

I'm looking at implementing an alternative mechanism that will not
cause so much cpu utilization.  Suggestions welcome.

Regards,
Vinod.

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