Red Hat Directory Server 7.1 for HP-UX11i v2 Integrity System Performance Tuning and Sizing Guideline

Red Hat Directory Server 7.1 Performance Tuning and Sizing Guidelines

average_space_each_entry_needs_in_the_entrycache can be found by:

Step 1: set nsslapd-cachememsize to some guessed value that is big enough to give a good sample and set

nsslapd-cachesize to –1.

Step 2: prime the server by executing ldapsearch command 1

Step 3: find out the value of currententrycachesize and currententrycachecount by executing

ldapsearch command 3.

Step 4: average_space_each_entry_needs_in_the_entrycache =

currententrycachesize / currententrycachecount

• Please note: for detailed information about attributes like currententrycachesize,

currententrycachecount, please refer to the

“Red Hat Directory Server 7.1 Administrator’s Guide”

Performance with different % database entries in entrycache

2000

4000

6000

8000

10000

12000

14000

0% 20% 40% 60% 80% 100% 120%

% of database entries in entrycache

operations / sec

250K

Figure 4: Performance with different percentage of database entries in entrycache. Measured on specific

Montecito-based test configuration with 8 CPUs@1.6GHz

nsslapd-cache-autosize

• nsslapd-cache-autosize

This performance tuning related attribute which is turned off by

default, specifies the percentage of free memory to use for all the

combined caches. For example, if the value is set to 80, then 80

percent of the remaining free memory would be claimed for the cache. If

you plan to run other servers on the machine, then the value will be

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