https://bugs.openldap.org/show_bug.cgi?id=10404
Issue ID: 10404
Summary: slapd uses all available memory and starts using swap
Product: OpenLDAP
Version: 2.6.10
Hardware: x86_64
OS: Linux
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: slapd
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
We have a problem with slapd using more and more memory until in starts using
swap.
We are using mdb and our maxsize is set to 8192000000.
The server has 32GB of ram.
data.mdb is around 2.6 GB
Some settings from our slapd.conf:
sizelimit 5000
timelimit 600
checkpoint 1024 15
loglevel sync stats
This is how it looks with top:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
314486 root 20 0 31.6g 26.2g 2.6g S 16.3 83.7 8,09 slapd
Depending on the load of the server it usually takes 2 weeks until all memory
has been used.
Things that we have tried:
Changed swapiness to 1
Changed slapd service to use this:
[Service]
Environment="LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libtcmalloc_minimal.so.4"
LimitCORE=infinity
LimitNOFILE=4096
Restart=on-failure
TimeoutStopSec=900
Everything worked fine with bdb and cache settings like:
cachesize 100000
idlcachesize 100000
But since switching to mdb we run out of memory.
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