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 number of worker threads
0
2000
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12000
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0 10 20 30 40 50 60 70 80 90 100 110 120 130
number of threads
operations / sec
8 cpus
Figure 2: Performance with different nsslapd-threadnumber. Measured on specific Montecito-based test
configuration with 8 CPUs@1.6GHz .
nsslapd-dbcachesize
Here is some information about nsslapd-dbcachesize from: “Red Hat Directory Server 7.1 Configuration,
Command, and File Reference”
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• nsslapd-dbcachesize
This performance tuning related attribute specifies database cache
size. Note that this is neither the index cache nor the entry cache. If
you activate automatic cache resizing, you override this attribute, by
replacing these values with its own guessed values at a later stage of
the server startup.
Entry DN: cn=config,cn=ldbm database,cn=plugins,cn=config
Valid Range: 500KB to 4GB for 32-bit platforms and 500KB to 2^64-1
for 64-bit platforms
Default Value: 10,000,000 bytes
Syntax: Integer
Example: nsslapd-dbcachesize: 10,000,000
The database cache is used by the database to create and manage indexes and perform other database specific work.
nsslapd-dbcache is set globally for the server and is shared by all the database backends on the server.
Tuning dbcachesize can be done by follow these steps:
Step 1: set nsslapd-dbcachesize to some value and then start the directory server.
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