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h1. Introduction

All components based on the Petals Component Development Kit provide following metrics:
* provider side:
** message exchange acceptor thread pool metrics,
** message exchange processor object pool metrics,
** message exchange processor thread pool metrics,
** message exchange counter
** message exchange processing response times,
* consumer side:
** no metric.

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h1. Monitoring the provider side

h2. Monitoring the message exchange acceptor thread pool

!message-exchange-acceptor-thread-pool.png|align=center!

See [Creating a graph using a simple data|How to create a graph with Cacti#Creating a graph using a simple data] to graph the stats of the thread pool accepting message exchanges:
* Script/Command of the data input method: {{petals-cli.sh \-h <petals_host> \-n <petals_jmx_port> \-u <petals_jmx_user> \-p <petals_jmx_password> \-c \-- monitoring \-o generic \-f mex-acceptor-thread-pool \-- \-n <component-id>}}
* Output fields of the script/command:
|| Name || Description || Type ||
| {{AllocatedThreadsMax}} | The maximum number of allocated threads | GAUGE |
| {{AllocatedThreadsCurrent}} | The current number of allocated threads | GAUGE |

h2. Monitoring the message exchange processor object pool

!message-exchange-processor-object-pool.png|align=center!

See [Creating a graph using a simple data|How to create a graph with Cacti#Creating a graph using a simple data] to graph the stats of the object pool of message exchanges:
* Script/Command of the data input method: {{petals-cli.sh \-h <petals_host> \-n <petals_jmx_port> \-u <petals_jmx_user> \-p <petals_jmx_password> \-c \-- monitoring \-o generic \-f mex-processor-object-pool \-- \-n <component-id>}}

!message-exchange-processor-thread-pool.png|align=center!

See [Creating a graph using a simple data|How to create a graph with Cacti#Creating a graph using a simple data] to graph the stats of the thread pool of message exchanges:
* Script/Command of the data input method: {{petals-cli.sh \-h <petals_host> \-n <petals_jmx_port> \-u <petals_jmx_user> \-p <petals_jmx_password> \-c \-- monitoring \-o generic \-f mex-processor-thread-pool \-- \-n <component-id>}}
* Output fields of the script/command:
|| Name || Description || Type ||
| {{AllocatedThreadsMax}} | The maximum number of allocated threads | GAUGE |
| {{AllocatedThreadsCurrent}} | The current number of allocated threads | GAUGE |
| {{IdleThreadsMax}} | The maximum number of idle threads | GAUGE |
| {{IdleThreadsCurrent}} | The current number of idle threads | GAUGE |
| {{MaxSize}} | The maximum size of the thread pool | GAUGE |
| {{MinSize}} | The minimum size of the thread pool | GAUGE |
| {{EnqueuedRequestsMax}} | The maximum number of requests that are enqueued waiting a thread to be processed | GAUGE |
| {{EnqueuedRequestsCurrent}} | The current number of requests that are enqueued waiting a thread to be processed | GAUGE |