I use the FAN (Fully Automated Nagios) distribution. I installed you plugin and I can use it without any error. For example: [root@PC plugins]# perl check_jmx4perl --url http://192.168.69.236:8081/j4p --alias MEMORY_HEAP_USED --base-alias MEMORY_HEAP_MAX --warning 80 --critical 90 OK - [MEMORY_HEAP_USED] : In range 1.06% (5608024 / 530907136) | '[MEMORY_HEAP_USED]'=5608024;424725708.8;477816422.4;0;530907136 However I would like to integrate it in Nagios and more precisely in centreon. I created a new command and I attached it to my server. It seems to work very well because I can get the same results that I copied you above. But I can't find a way to create a graph with all these datas. Indeed, I would like to see the result on a good graph and see what happen to the memory when my platform is overloaded. Can you give me some tips/advices to help me in this way. Feel free to ask any question that can help you. I'm french and I hope my englsh is not so bad. Thank you very much Romain