Optimization help

[Chris Jackson <cjackson@pasco.k12.fl.us>]

What can I do to maximize the performance of my setup?  System has 16gb of ram.

OpenLDAP 2.4.19-15

Import LDIF is 4,611,156 bytes.   Backend is BDB.

du -c -h *.bdb

6.5M	cn.bdb
8.0K	displayName.bdb
1.9M	dn2id.bdb
3.3M	givenName.bdb
17M	id2entry.bdb
5.6M	mail.bdb
740K	objectClass.bdb
7.5M	ou.bdb
3.2M	sn.bdb
3.4M	uid.bdb
8.0K	uidNumber.bdb
48M	total

Portion of slapd.conf:

database	bdb
checkpoint	1024 15

##threads 8
cachesize 100000
idlcachesize 300000
***no dncachesize (default infinite)

Current DB_CONFIG:

# one 0.25 GB cache
##set_cachesize 0 268435456 1
set_cachesize 1 0 1

# Data Directory
#set_data_dir db

# Transaction Log settings
set_lg_regionmax 262144
set_lg_bsize 2097152
#set_lg_dir logs