база данных Oracle PMDA (Oracle database PMDA)
Имя (Name)
pmdaoracle - Oracle database PMDA
Описание (Description)
pmdaoracle is a Performance Co-Pilot PMDA which extracts live
performance data from a running Oracle database.
Установка (Installation)
pmdaoracle uses a configuration file from (in this order):
• /etc/pcpdbi.conf
• $PCP_PMDAS_DIR/oracle/oracle.conf
• ./oracle.conf
This file can contain overridden values (Perl code) for the
settings listed at the start of pmdaoracle.pl, for example:
• $username - username to connect to the database [default:
'SYSTEM']
• $password - password to connect to the database [default:
'manager']
• $host - host the database is running on [default:
'localhost']
• $port - port the database is listening on [default: '1521']
• $os_user - operating system username (PMDA will run with the
corresponding user id) [default: oracle]
• @sids - an array of $ORACLE_SID database identifiers
[default: ('master')]
In order to test your local settings, a simple script is provided
that will connect and disconnect from the database - verifying
fundamental configuration is in place before continuing on. If
the $PCP_PMDAS_DIR/oracle/connect.pl script cannot connect, do
not proceed with installation of the PMDA as it will be
unsuccessful. Correct your local settings first.
Once this is setup, you can access the names and values for the
oracle performance metrics by doing the following as root:
# cd $PCP_PMDAS_DIR/oracle
# ./Install
To uninstall, the following must be done as root:
# cd $PCP_PMDAS_DIR/oracle
# ./Remove
pmdaoracle 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.
CONNECTION STATE
By default, pmdaoracle will aggressively attempt to maintain
persistent connections to Oracle to ensure timely responses to
its queries, and will automatically re-connect if a connection
drops.
However, in certain circumstances this may be undesirable, so a
manual pmStore(3) mechanism is provided to explicitly control
disconnecting and reconnecting to an Oracle instance. This can
be used, for example, to ensure that pmdaoracle is not connected
at shutdown, to ensure a clean Oracle shutdown process.
The pmstore(1) command can be used to disconnect and reconnect.
Using the individual instances of the oracle.control.connected
metric, one can set the connection state to either up (1) or down
(0). Additionally, pminfo(1) can report on the current status of
Oracle connections.
# pminfo ‐f oracle.control.connected
oracle.control.connected
inst [0 or "master"] value 1
# pmstore oracle.control.connected 0
oracle.control.connected inst [0 or "master"] old value=1 new value=0
Файлы (Files)
/etc/pcpdbi.conf
configuration file for all PCP database monitors
$PCP_PMDAS_DIR/oracle/oracle.conf
configuration file for pmdaoracle
$PCP_PMDAS_DIR/oracle/sample.conf
example configuration file for pmdaoracle using
$LD_LIBRARY_PATH
$PCP_PMDAS_DIR/oracle/connect.pl
configuration test script for Oracle database connectivity
$PCP_PMDAS_DIR/oracle/Install
installation script for the pmdaoracle agent
$PCP_PMDAS_DIR/oracle/Remove
undo installation script for the pmdaoracle agent
$PCP_LOG_DIR/pmcd/oracle.log
default log file for error messages from pmdaoracle
Окружение PCP (PCP environment)
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values
for these variables. The $PCP_CONF variable may be used to
specify an alternative configuration file, as described in
pcp.conf(5).
Смотри также (See also)
PCPIntro(1), pmdadbping(1), pminfo(1), pmstore(1), DBI(3) and
pmStore(3).
