Ubuntu
cups package

  1. Bug #1831021
  2. Comment #0

Comment 0 for bug 1831021

Revision history for this message
Dariusz Gadomski (dgadomski) wrote :

Under heavy workload conditions cups can reach irrationally high memory consumption very quickly (tens of GBs).

Test case:
1. Set MaxJobs to 40000 in cupsd.conf.
2. sudo apt install cups-pdf
3. Fill the queue with jobs:
while [ 1 ]; lp -d PDF /usr/share/cups/data/default.pdf; done
4. Cancel all jobs
cancel -a PDF
5. Restart cups.
6. Start filling the queue again (as in step 3).

Expected result:
Jobs are processed and memory consumption is proportional to the number of jobs.

Actual result:
After step 5 or at latest step 6 memory consumption starts to increase exponentially - from ~150-200 MB to 8+GB. Without foreseeing this it's very easy to get cups killed by OOM killer.