Red Hat Bugzilla – Bug 132949
cups-lpd is very slow with many printqueues
Last modified: 2007-11-30 17:07:04 EST
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Description of problem:
While using cups-lpd with about 7500 printqueues printing a small
document takes very long time and its impossible to print more than 30
jobs per minute.
While printing directly to cups via ipp or http thereï¿½s no problem
handling thousands of printqueues with an acceptable performance.
I found out that cups-lpd is polling the whole printqueues via the lo
interface from the cupsd (with 7500 printqueues its about 14MB traffic
on the lo interface for each printjob) before selecting the right one
and send the job to it.
This behaviour is very bad and slows down systems with many
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.set up 7000 print queues
2.print a small document via lpd
3.see what happens on lo and how long it takes
Actual Results: The cups-lpd acts very slow and catches nearly all
Expected Results: It should send out small printjobs very quick.
*** Bug 154834 has been marked as a duplicate of this bug. ***
This bug is filed against RHEL 3, which is in maintenance phase.
During the maintenance phase, only security errata and select mission
critical bug fixes will be released for enterprise products. Since
this bug does not meet that criteria, it is now being closed.
For more information of the RHEL errata support policy, please visit:
If you feel this bug is indeed mission critical, please contact your
support representative. You may be asked to provide detailed
information on how this bug is affecting you.