Sun Java System Web Server 6.1 SP9 Performance Tuning, Sizing, and Scaling Guide

Using Performance Buckets

Performance buckets allow you 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 of collecting this information is little and impact on the server performance is usually negligible. This information can later be accessed using the perfdump utility. The following information is stored in a bucket:


You must specify all configuration information for performance buckets in the magnus.conf and obj.conf files. Only the default bucket is automatically enabled.

First, you must enable performance measurement as described in Monitoring Current Activity Using the perfdump Utility

The following examples show how to define new buckets in magnus.conf:

Init fn="define-perf-bucket" name="acl-bucket" description="ACL bucket"

Init fn="define-perf-bucket" name="file-bucket" description="Non-cached responses"

Init fn="define-perf-bucket" name="cgi-bucket" description="CGI Stats"


The example above creates three buckets: acl-bucket, file-bucket, and cgi-bucket. To associate these buckets with functions, add bucket=bucket-name to the obj.conf function for which you wish to measure performance.


PathCheck fn="check-acl" acl="default" bucket="acl-bucket"
Service method="(GET|HEAD|POST)" type="*~magnus-internal/*" 
fn="send-file" bucket="file-bucket"
<Object name="cgi">
ObjectType fn="force-type" type="magnus-internal/cgi"
Service fn="send-cgi" bucket="cgi-bucket"

Performance Report

The server statistics in buckets can be accessed using the perfdump utility. The performance buckets information is located in the last section of the report returned by perfdump.

The report contains the following information:

  Performance Counters:
                             Average        Total     Percent

  Total number of requests:                     0
  Request processing time:    0.0000       0.0000

  default-bucket (Default bucket)
  Number of Requests:                           0    (  0.00%)
  Number of Invocations:                        0    (  0.00%)
  Latency:                    0.0000       0.0000    (  0.00%)
  Function Processing Time:   0.0000       0.0000    (  0.00%)
  Total Response Time:        0.0000       0.0000    (  0.00%)