Slapd Performance wrt Query Size

Test Environment

OpenLDAP server (slapd V 2.0.27 ) installed on a Intel(R) Xeon(TM) CPU 2.40GHz with 1GB of RAM running Scientific Linux 3. The size of the LDAP database is 20MB.

Test Description

Measure the response time measuring how many requests can be handled for a certain queried datasize. These are the query datasizes which are used in this test: no_result (query failure 0KB), 1KB,10KB, 150KB, 370KB, 1MB, 2MB, 3MB, 5MB, 8MB, 10MB, dump (full dump of the ldap db, 20MB) Each query represents the most used one by the users. This gives a more realistic view on how the load of the real LDAP instance (lcg-bdii.cern.ch) is.

Test Results

After gathering the data, the following diagrams were created using 'gnuplot'.

Performance Analysis with small query sizes

Performance Analysis with big query sizes