[cups.general] Performance issues in cups 1.3

[Michael R Sweet]

Johan Bernhardsson wrote:
> ...
> When we push alot jobs through a client the load rises quite fast and we get delays.
> 
> This seems to have started with the 1.3 release as we didnt have that in 1.2.7 that we ran before. The cpu usage is not the same.
> 
> Has anyone else noted anything like this ?

I haven't, but the scheduler in CUPS 1.3 no longer uses select() when
one of the alternate mechanisms is available - that would mean poll()
or epoll() on RHEL4.

strace output from cupsd on the servers might be useful in seeing
where the scheduler is spending its time...

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Michael R Sweet                        Senior Printing System Engineer