【LoadRunner技术讲座12】使用LoadRunner监测MySQL数据库的性能-方法二

方法二：通过编写脚本来进行监控

 

// mysql_dll.cpp : Defines the entry point for the DLL application. #include "stdafx.h" #include "stdlib.h" MYSQL *conn=NULL; MYSQL_RES *p_res_ptr=NULL; MYSQL_ROW sqlrows; BOOL APIENTRY DllMain( HANDLE hModule,                        DWORD  ul_reason_for_call,                        LPVOID lpReserved       ) {     return TRUE; } extern "C" int _declspec(dllexport) init_mysql_connection(char *str_server,char *str_username,char *str_pwd,char *str_Table) { conn=mysql_init(NULL);     if(!conn) {   printf("\nFailed to initate MySQL connection");   return 1;   exit(0); }     else {   printf("\nSuccess to initate MySQL connection");   if (!mysql_real_connect(conn,str_server,str_username,str_pwd,str_Table,0,NULL,0))   {    printf( "Failed to connect to MySQL: Error: %s\n", mysql_error(conn));   }   else   {    printf("\nLogged on to %s sucessfully",str_server);    return 0;   }   return 0; } } extern "C" int _declspec(dllexport) close_mysql_connection() { if(conn=NULL) {   printf("\nConnection is Null");   return 1;   exit(0); } else {      mysql_free_result(p_res_ptr);   printf("\nClose connection");   mysql_close(conn);     return 0; } } //"show status like \'qcache%\'" extern "C" int _declspec(dllexport) get_mysql_table_query(char *str_query) { int res=0; res=mysql_query(conn,str_query); if(res) {   printf("Failed to mysql query: Error: %s\n", mysql_error(conn));   return 1; } else {   printf("\nSucess in Mysql Query");   return 0; } }   extern "C" int _declspec(dllexport) get_mysql_query_data(char *str_query,char *str_data) {     unsigned long u1_numrow=0;     unsigned int i_index = 0; p_res_ptr=mysql_use_result(conn); if(p_res_ptr){   while((sqlrows=mysql_fetch_row(p_res_ptr))){      if(*sqlrows[0]=*str_query)    {     strcpy(str_data,sqlrows[1]);          }   } } return NULL; }   lr 9.1中代码： Action() {         int i=0;         double x;         char *str_data;         str_data=(char *)malloc(20*sizeof(char));         lr_load_dll("D:\\vc\\mysql_dll\\Debug\\mysql_dll.dll");         i= init_mysql_connection("localhost","root","123456","mysql");         lr_output_message("%d",i);           for(;;)        {             get_mysql_query_data("Qcache_hits",str_data);             i=get_mysql_table_query("show status like \'qcache%\'");             lr_output_message("%d",i);             x = atof(str_data);             lr_user_data_point("hits",x);             lr_think_time(5);        }         lr_output_message("%d",x);      close_mysql_connection(); return 0; }