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ITS#5860 slapd in openldap-2.4.16 still doesn't respect memory bounds




I have tried openldap-2.4.16 (latest) BDB 4.7.25 with all patches from
Oracle on Dell AMD64 RAM 4Gb, 8 CPUs, OS Solaris 10.
According to ITS#5860 slapd should not allocate more memory than it was
specified. In fact I have the same behaviour as it was with previous
version (2.4.11). It correctly allocates 1.2 Gb via shared memory (for
set_cachesize 300 MB). But slapd process continuosly grows in memory until
32-bit limit then crashes due to unavalable memory resources. I need to
mention bdb database size is less then 1 GB.
After restart it rapidly consumes 1.5 GB RSS in few minutes and then it
grows beyond the limit during 24 hours. The more queries are processing
the more memory it eats.
I am using this database for logging which size grows.
The question is: is it possible to use 32-bit openldap with relatively
large database sizes that override 32-bit per-process memory space?

My slapd.conf contains:

threads 64
concurrency 50

cachesize 200000
dncachesize 400000
idlcachesize 600000

shm_key 10

DB_CONFIG:

set_cachesize 0 300097152 1
set_lk_max_locks 1000000
set_lk_max_lockers 1000000
set_lk_max_objects 1000000
set_lg_regionmax 1048576
set_lg_max 10485760
set_lg_bsize 2097152

ls -ls ./openldap-data
total 1212876
-rw-r--r-- 1 slapd nobody 640 Apr 17 08:42 DB_CONFIG
-rw------- 1 slapd nobody 8 Apr 16 10:50 __db.001
-rw-r--r-- 1 slapd nobody 4096 Apr 16 10:50 alock
-rw------- 1 slapd nobody 6053888 Apr 17 09:50 cn.bdb
-rw------- 1 slapd nobody 1024000 Apr 17 09:50 dhcpHWAddress.bdb
-rw------- 1 slapd nobody 96583680 Apr 17 09:50 dn2id.bdb
-rw------- 1 slapd nobody 515637248 Apr 17 09:50 id2entry.bdb
-rw------- 1 slapd nobody 1343488 Apr 17 09:50 objectClass.bdb

Any help would be much appreciated.

Regards, Sergey.