Sun Microsystems Netscape Enterprise Server, Administrator'S Manual

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Benchmarking the Netscape Enterprise Server
260 Netscape Enterprise Server Administrator’s Guide
SPECweb96 Tuning
SPECweb96 uses a very large data fileset. This fileset far exceeds the Netscape
Enterprise Server’s expected fileset size. For instance, on the Netscape home
web site, you can obtain more than an 80% cache-hit rate with a 10MB cache.
With SPECweb96, a 10MB cache can yield cache-hit rates as low as 20% (this
number varies depending depending on the SPECweb96 load requested; larger
loads use larger filesets).
Note
To optimize performance in a SPECweb96 test, use a machine that has enough
RAM to cache the entire file set and increase the web server’s cache size (see
See “Cache Information” on page 238).
1.
Calculate the number of files used in the SPECweb96 fileset. The
SPECweb96 fileset size is based on the number of SPECweb96 OPS
requested in the test run. The following formula calculates the number of
files:
files= ( ( (int) ( (sqrt(OPS/5) * 10.0) + 0.5) ) * 36 )
fileset size = files * 142207.5
For an example, see Table 10.1.
2.
Increase the number of files that the web server’s cache will hold to the
number of files calculated in step 1.
In the
obj.conf
configuration file, use the line:
Init fn=cache-init
Append these values to the
cache-init
line:
MaxNumberOfCachedFiles = <Step 1-Number of files>
MaxNumberOfOpenCachedFiles = <Step 1-Number of files>
3.
Increase the web server’s total cache size to be large enough to hold the
entire SPECweb96 fileset.
MaxTotalCachedFileSize = Step 1-Fileset size
4.
Increase the web server’s largest cached file size to be large enough to hold
all SPECweb files.