Whileit would be extremely unusual to hit this possible performance problem, the number of
groupscached in a single ACL cache entry can be tuned with Maximum Groups setting on the
conguration'sPerformance tab ⇒Cache sub tab. Or you can use the max-groups-per-user
propertyof the wadm set-acl-cache-prop command.
Themaximum age setting of the ACL cache determines the number of seconds before the cache
entriesexpire. Each time an entry in the cache is referenced, its age is calculated and checked
againstthe maximum age setting. The entry is not used if its age is greater than or equal to the
maximumage. The default value is 120 seconds. If your LDAP is not likely to change often, use a
largenumber for the maximum age. However, if your LDAP entries change often, use a smaller
value.For example, when the value is 120 seconds, the Web Server might be out of sync with the
LDAPserver for as long as two minutes. Depending on your environment, that might or might
notbe a problem.
TuningJava Web Application Performance
Thissection contains information to help you improve the performance of your Java Web
Applications.This section includes the following topics:
■“UsingPrecompiled JSPs” on page 78
■“UsingServlet/JSP Caching” on page 79
■“Conguringthe Java Security Manager” on page 79
■“ConguringClass Reloading” on page 79
■“AvoidingDirectories in the Classpath” on page 80
■“Conguringthe Web Application’sSession Settings” on page 80
Inaddition, see the following sections for other tuning information related to the Java Web
Applications:
■“JavaVirtual Machine (JVM) Information” on page 70
■“JDBCResource Information” on page 72

UsingPrecompiled JSPs

CompilingJSPs is a resource-intensive and relatively time-consuming process. By default, the
WebServer periodically checks to see if your JSPs have been modied and dynamically reloads
them;this allows you to deploy modications without restarting the server. The
reload-intervalproperty of the jsp-config element in sun-web.xml controls how often the
serverchecks JSPs for modications. However, there is a small performance penalty for that
checking.
Whenthe server detects a change in a .jsp le, only that JSP is recompiled and reloaded; the
entireweb application is not reloaded.
Ifyour JSPs don't change, you can improve performance by precompiling your JSPs.
TuningJavaWeb Application Performance
SunJavaSystem Web Server 7.0 Update 1 Performance Tuning,Sizing, and Scaling Guide •78