JDS Australia

LoadRunner does not come with a monitor for Tomcat. Fortunately, you can easily create one in about 5 minutes…

Tomcat exposes metrics related to JVM memory and Servlet container threads (and some other useful information) on a Status page at <Server Name>/manager (ask your Tomcat admin to enable it).

Create a standard web vuser script which loads the Tomcat Status page, and capture all the metrics you want using web_reg_save_param. Then log these values using lr_user_data_point. The metrics will be visible in the LoadRunner Controller and also in LoadRunner Analysis on the User-Defined Data Points Graph.

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lr_start_transaction("monitor tomcat");
 
/*
<h1>JVM</h1><p> Free memory: 130.99 MB Total memory: 254.18 MB Max memory: 1016.12 MB</p>
*/
 
web_reg_save_param("JVMFreeMemory",
	"LB=Free memory: ",
	"RB= MB",
	"Ord=1",
	LAST);
 
web_reg_save_param("JVMTotalMemory",
	"LB=Total memory: ",
	"RB= MB",
	"Ord=1",
	LAST);
 
web_reg_save_param("JVMMaxMemory",
	"LB=Max memory: ",
	"RB= MB",
	"Ord=1",
	LAST);
 
web_reg_find("Text=/manager", 
	LAST);
 
web_url("status", 
	"URL=http://{ServerName}/manager/status", 
	"Resource=0", 
	"RecContentType=text/html", 
	"Referer=", 
	"Snapshot=t1.inf", 
	"Mode=HTTP", 
	LAST);
 
lr_end_transaction("monitor tomcat", LR_AUTO);
 
// Tomcat JVM metrics
lr_user_data_point("Tomcat JVM Free memory", atof(lr_eval_string("{JVMFreeMemory}")));
lr_user_data_point("Tomcat JVM Total memory", atof(lr_eval_string("{JVMTotalMemory}")));
lr_user_data_point("Tomcat JVM Max memory", atof(lr_eval_string("{JVMMaxMemory}")));

An example script is available for download here [7 KB].

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