Full_Name: Ryan Tandy Version: 2.4.46 OS: Debian URL: ftp://ftp.openldap.org/incoming/20180511_rtandy_syncrepl-memory-consumer.tgz Submission from: (NULL) (70.66.128.207) Submitted by: ryan When running object-based syncrepl, and making changes to groups, the provider slapd uses more and more memory, apparently without bound. We've discussed this issue before but there was no ITS tracking it specifically. original Debian bug: https://bugs.debian.org/725091 and a possibly related openldap-technical post: https://www.openldap.org/lists/openldap-technical/201503/msg00206.html reproducer: ftp://ftp.openldap.org/incoming/20180511_rtandy_syncrepl-memory-consumer.tgz ./prepare ./runslapd (backgrounds a provider slapd and a consumer slapd) ./modify (makes a number of modifications on the provider) ./clean (kills both slapds and cleans databases) Run top in another terminal and watch the memory growth. On my system, the provider grows to over 3 GB resident and does not shrink even after replication completes. with delta-syncrepl enabled, the producer's RSS is only around 10 MB. Reproduced on Debian unstable with 2.4.46 and glibc malloc (glibc 2.27-3) and tcmalloc_minimal (2.7-1).