[Debichem-devel] Bug#1107330: openbabel: autopkgtest uses incredible amount of memory on s390x

Paul Gevers elbrus at debian.org
Thu Jun 5 18:41:32 BST 2025


Source: openbabel
Version: 3.1.1+dfsg-12
Severity: important
X-Debbugs-CC: debian-s390 at lists.debian.org
User: debian-s390 at lists.debian.org
Usertags: s390x

Hi,

I was debugging performance issues on ci.debian.net today, and noticed 
that s390x was running into memory problems. openbabel quickly became a 
suspect and indeed it turns out to use an insane amount of it during the 
test.

I have spotted at least this (not the worse) in top:
     PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ 
COMMAND
  653405 xxxxx     20   0   90.1g  26.7g   9908 D   6.3  85.0  10:04.02 
python3

And the peak I spotted while looping free -h was 72 GB added by the test
and then I killed the test run.

I'll add openbabel to the reject_list and will remove it again when this 
bug report is closed.

Paul
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