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pmdasystemtap(1) [centos man page]

PMDASYSTEMTAP(1)					       Performance Co-Pilot						  PMDASYSTEMTAP(1)

NAME
pmdasystemtap - Systemtap performance metrics domain agent (PMDA) DESCRIPTION
pmdasystemtap is a Performance Metrics Domain Agent (PMDA) which exports metric values from the Linux Systemtap dynamic tracing toolkit. This implementation uses the stap(1) tool, which is a front-end to the Systemtap toolkit. INSTALLATION
In order to access performance data exported by Systemtap from with PCP, it is necessary to perform two configuration steps: 1. Configure Systemtap probes, and verify them with stap(1). These should be produced in a format that is easily parsed, and then stored in the $PCP_PMDAS_DIR/systemtap/probes.stp file. 2. Configure pmdasystemtap to extract the values from the text produced by stap. Two example probes are implemented in the default systemtap PMDA script - readdir and sync traces (see $PCP_PMDAS_DIR/systemtap/pmdasystemtap.pl for details). # cd $PCP_PMDAS_DIR/systemtap # [ edit probes.stp, test /usr/bin/stap probes.stp ] # [ edit pmdasystemtap.pl ] Once this is setup, you can access the names and values for the systemtap performance metrics by doing the following as root: # cd $PCP_PMDAS_DIR/systemtap # ./Install If you want to undo the installation, do the following as root: # cd $PCP_PMDAS_DIR/systemtap # ./Remove pmdasystemtap is launched by pmcd(1) and should never be executed directly. The Install and Remove scripts notify pmcd(1) when the agent is installed or removed. FILES
$PCP_PMDAS_DIR/systemtap/probes.stp probe configuration file for stap(1), run by pmdasystemtap $PCP_PMDAS_DIR/systemtap/Install installation script for the pmdasystemtap agent $PCP_PMDAS_DIR/systemtap/Remove undo installation script for the pmdasystemtap agent $PCP_LOG_DIR/pmcd/systemtap.log default log file for error messages from pmdasystemtap SEE ALSO
pmcd(1) and stap(1). 3.8.10 Performance Co-Pilot PMDASYSTEMTAP(1)

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PMDAMEMCACHE(1) 					       Performance Co-Pilot						   PMDAMEMCACHE(1)

NAME
pmdamemcache - memcache performance metrics domain agent (PMDA) DESCRIPTION
This PMDA extracts performance data from memcached, a distributed memory caching daemon commonly used to improve web serving performance. A farm of memcached processes over multiple servers can be utilised by a single web application, increasing the total available object cache size, and decreasing the database load associated with smaller cache sizes. This system is described in detail at http://www.danga.com/memcached. INSTALLATION
Configure pmdamemcache to extract the values from set of hosts used in the memcache farm. These hosts can be listed in the $PCP_PMDAS_DIR/memcache/memcache.conf file, in the format (i.e. Perl array) described at the top of pmdamemcache.pl. A custom refresh rate can also be configured using this mechanism. # cd $PCP_PMDAS_DIR/memcache # [ edit memcache.conf ] Once this is setup, you can access the names and values for the memcache performance metrics by doing the following as root: # cd $PCP_PMDAS_DIR/memcache # ./Install If you want to undo the installation, do the following as root: # cd $PCP_PMDAS_DIR/memcache # ./Remove pmdamemcache is launched by pmcd(1) and should never be executed directly. The Install and Remove scripts notify pmcd(1) when the agent is installed or removed. FILES
$PCP_PMDAS_DIR/memcache/memcache.conf configuration file listing monitored memcache instances $PCP_PMDAS_DIR/memcache/Install installation script for the pmdamemcache agent $PCP_PMDAS_DIR/memcache/Remove undo installation script for the pmdamemcache agent $PCP_LOG_DIR/pmcd/memcache.log default log file for error messages from pmdamemcache SEE ALSO
pmcd(1) and memcached(1). 3.8.10 Performance Co-Pilot PMDAMEMCACHE(1)
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