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
Performance with different size of dbcache
10000
10500
11000
11500
12000
12500
13000
13500
14000
0 50 100 150 200 250 300 350 400 450
dbcache in 1000000 bytes
operations / sec
250k,8cpus
Figure 3: Performance with different nsslapd-dbcachesize. Measured on specific Montecito-based test
configuration with 8 CPUs@1.6GHz.
nsslapd-cachememsize and nsslapd-cachesize
Here is some information about nsslapd-cachememsize and nsslapd-cachesize: “Red Hat Directory
Server 7.1 Configuration, Command, and File Reference”
• nsslapd-cachememsize:
This performance tuning related attribute specifies the cache size in
terms of available memory space. Limiting cachesize in terms of memory
occupied is the simplest method. By activating automatic cache resizing
you override this attribute, replacing these values with its own
guessed values at a later stage of the server startup. If you attempt
to set a value that is not a number or is too big for a 32-bit signed
integer you will receive an LDAP_UNWILLING_TO_PERFORM error message
with additional error information explaining the problem.
Entry DN: cn=Netscaperoot,cn=ldbm database,cn=plugins,cn=config
or cn=UserRoot,cn=ldbm database,cn=plugins,cn=config
Valid Range: 500Kbyte to 4Gbyte for 32-bit platforms and 500Kbyte to
2^64 -1 for 64-bit platforms
Default Value: 10 485 760 (10Mb)
Syntax: Integer
Example: nsslapd-cachememsize:10Mb
• nsslapd-cachesize:
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