Sun Microsystems Netscape Enterprise Server, Руководство администратора

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Performance Buckets
222 Netscape Enterprise Server Administrator’s Guide
Performance Buckets
Performance buckets allow users to define buckets, and link them to various
server functions. Every time one of these functions is invoked, the server
collects statistical data and adds it to the bucket. For example, “
send-cgi
” and
“
NSServletService
” are functions used to serve the CGI and Java servlet
requests respectively. You can either define two buckets to maintain separate
counters for CGI and servlet requests, or create one bucket that counts requests
for both types of dynamic content. The cost collecting this information is little
and impact on the server performance is negligible. This information can later
be accessed using the perfdump utility. The following information is stored in a
bucket:
• Name of the bucket. This name is used for associating the bucket with a
function.
• Description. A description of the functions that the bucket is associated
with.
• Number of requests for this function. The total number of times that this
function was requested to be invoked.
• Number of times the function was invoked. This number may not coincide
with the number of requests for the function because some functions may
be executed more than once for a single request.
• Function latency or the dispatch time. The time taken by the server to
invoke the function.
• Function time. The time spent in the function itself.
The following buckets are pre-defined by the server:
•
cache-bucket
.
Records the statistics for accelerated cache functions. All the static content
requests served using the accelerator cache are counted in this bucket.
•
default-bucket
.
Records statistics for the functions not associated with any user defined or
built-in bucket.