Topic: Introduction-to-Loadrunner-Part-8

LoadRunner Monitors

• LoadRunner Controller is integrated with real-time monitoring capabilities.
• Real-time monitoring helps to record all the system and application related information during the entire run of the test with definite sampling interval. This would help to isolate, identify and resolve performance bottlenecks through the analysis of the data collected through the various system counters collected during monitoring.

List of Key LoadRunner Monitors

• Windows Resource Monitor
• Unix Resource Monitor
• Web Server Monitors (Apache, IIS, iPlanet)
• Database Monitors (Oracle, DB2, SQL Server, Sybase)
• Application Server Monitors (Weblogic, Websphere, Oracle 9i Apps Server)
• ERP/CRM Server Resource Monitors (Siebel, SAP, Peoplesoft)
• Middleware Resource Monitors (Tuxedo, IBM MQ Series)

J2EE Performance Monitors

Object	Measurement	Description
Web Service	Bytes Sent/sec	The rate at which the data bytes are sent by the Web service
Web Service	Bytes Received/sec	The rate at which the data bytes are received by the Web service
Web Service	Get Requests/sec	The rate at which HTTP requests using the GET method are made. Get requests are generally used for basic file retrievals or image maps, though they can be used with forms.
Web Service	Post Requests/sec	The rate at which HTTP requests using the POST method are made. Post requests are generally used for forms or gateway requests.
Web Service	Maximum Connections	The maximum number of simultaneous connections established with the Web service
Web Service	Current Connections	The current number of connections established with the Web service
Web Service	Current NonAnonymous Users	The number of users that currently have a non-anonymous connection using the Web service
Web Service	Not Found Errors/sec	The rate of errors due to requests that could not be satisfied by the server because the requested document could not be found. These are generally reported to the client as an HTTP 404 error code.
Process	Private Bytes	The current number of bytes that the process has allocated that cannot be shared with other processes.

Websphere Application Server


Measurement	Description
MemoryFree	The amount of free memory remaining in the Java Virtual Machine
MemoryTotal	The total memory allocated for the Java Virtual Machine
MemoryUse	The total memory in use within the Java Virtual Machine

DataSource	Resources related to a specific data source specified by the "name" attribute
ConnectionCreates	The number of connections created
ConnectionDestroys	The number of connections released
ConnectionPoolSize	The average size of the pool, i.e., number of connections
ConnectionAllocates	The number of times a connection was allocated
ConnectionWaiters	The average number of threads waiting for a connection
ConnectionWaitTime	The average time, in seconds, of a connection grant
ConnectionTime	The average time, in seconds, that a connection is in use
ConnectionPercentUsed	The average percentage of the pool that is in use
ConnectionPercentMaxed	The percentage of the time that all connections are in use

Oracle Database Server


Measurement	Description
CPU used by this session	This is the amount of CPU time (in 10s of milliseconds) used by a session between the time a user call started and ended.
Bytes received via SQL*Net from client	The total number of bytes received from the client over Net8
Logons current	The total number of current logons
Opens of replaced files	The total number of files that needed to be reopened because they were no longer in the process file cache
User calls	Oracle allocates resources (Call State Objects) to keep track of relevant user call data structures every time you log in, parse, or execute. When determining activity, the ratio of user calls to RPI calls gives you an indication of how much internal work gets generated as a result of the type of requests the user is sending to Oracle.
SQL*Net roundtrips to/from client	The total number of Net8 messages sent to, and received from, the client
Bytes sent via SQL*Net to client	The total number of bytes sent to the client from the foreground process(es)
Opened cursors current	The total number of current open cursors
DB block changes	Closely related to consistent changes, this statistic counts the total number of changes that were made to all blocks in the SGA that were part of an update or delete operation. These are changes that are generating redo log entries and hence will be permanent changes to the database if the transaction is committed. This statistic is a rough indication of total database work and indicates (possibly on a per-transaction level) the rate at which buffers are being dirtied.
Total file opens	The total number of file opens being performed by the instance. Each process needs a number of files (control file, log file, database file) to work against the database

Resource for Hands-on

• Mercury Web tours Application
• Mercury Demo Web Application Readme.doc
• User’s Guide for VUGen, Controller & Analysis
• LoadRunner for the Web 8.1 Student Workbook (LR7WEB-BOOK-04a.pdf)
• Correlation Guide (Correlation.doc)
• Case Study on Flight Booking System.