New subject: [Issue 9830] slapd using more memory on linux kernel 5.xx then kernel 4.19

25 Apr 2022


      https://bugs.openldap.org/show_bug.cgi?id=9830
Issue ID: 9830
           Summary: slapd using more memory on linux kernel 5.xx then
                    kernel 4.19
           Product: OpenLDAP
           Version: 2.4.59
          Hardware: x86_64
                OS: Linux
            Status: UNCONFIRMED
          Keywords: needs_review
          Severity: normal
          Priority: ---
         Component: slapd
          Assignee: bugs@openldap.org
          Reporter: pavel.mamonov@wildix.com
  Target Milestone: ---
Hi, there
After upgrade a debian distro from 10 to 11 we are faced with consumption of
memory more then before. We testing on the same system with different kernels.
========================================
System with a kernel 4.19:
using of memory (slapd) ~ 100-120mb (max)
slapd                             2.4.59
libc6:amd64                       2.31-13+deb11u2
linux-image-4.19.0-14-cloud-amd64 4.19.171-2
========================================
System with a kernel 5.10:
using of memory (slapd) ~ 135-235mb (max)
slapd                             2.4.59
libc6:amd64                       2.31-13+deb11u2
linux-image-5.10.0-10-cloud-amd64 5.10.84-1
========================================
Also we tried to use other allocator of memory like "libtcmalloc-minimal4:amd64
       2.8.1-1" - but, unfortunately, it does not help us.
Could you give advice what we can do for optimize memory and reduction using of
it ?
If need additional info please, let me know.
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[Issue 9830] New: slapd using more memory on linux kernel 5.xx then kernel 4.19