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With asadmin, use the following command to list the monitoring parameters available:
list --user admin --port 4848
-m server-instance-name.http-service.*
where server-instance-name is the name of the server instance.
Use the following command to get the values:
get --user admin --port 4848 -m server.http-service.parameter-name.*
where parameter-name is the name of the parameter to monitor.
Statistics collection is enabled by default. Disable it by adding the following property to
domain.xml and restart the server:
<property name="statsProfilingEnabled" value="false" />
Disabling statistics collection will increase performance.
You can also view monitoring statistics with the Admin Console. The information is divided
into the following categories:
■
“DNS Cache Information (dns)” on page 61
■
“File Cache Information (le-cache)” on page 63
■
“Keep Alive (keep-alive)” on page 63
DNS Cache Information (dns)
The DNS cache caches IP addresses and DNS names. Your server’s DNS cache is disabled by
default. In the DNS Statistics for Process ID All page under Monitor in the web-based
Administration interface the following statistics are displayed:
Enabled
If the DNS cache is disabled, the rest of this section is not displayed.
By default, the DNS cache is o. Enable DNS caching with the Admin Console by setting the
DNS value to “Perform DNS lookups on clients accessing the server”.
CacheEntries (CurrentCacheEntries / MaxCacheEntries)
The number of current cache entries and the maximum number of cache entries. A single cache
entry represents a single IP address or DNS name lookup. Make the cache as large as the
maximum number of clients that access your web site concurrently. Note that setting the cache
size too high is a waste of memory and degrades performance.
Set the maximum size of the DNS cache by entering or changing the value in the Size of DNS
Cache eld of the Performance Tuning page.
HTTP ServiceSettings
Chapter3 • Tuningthe EnterpriseServer 61