Database Reference
In-Depth Information
The
cluvfy
utility supports the following arguments:
-collect cluster|database
-bestpractices|-mandatory|-deviations
-save -savedir --to save the output under a particular location
-html -- output will be written in an HTML file
Real-Time RAC Database Monitoring - oratop
The
oratop
utility, which is currently restricted to the Linux operating system, resembles an OS-specific
top-like
utility, providing near-real-time resource monitoring capability for a RAC and single-instance database from 11.2.0.3
onward. It is a very lightweight monitoring utility that utilizes very minimal resources, 0.20% memory and <1% CPU,
on the server. With this utility, you can monitor a RAC database, a stand-alone database, and local as well as
remote databases.
Invoke the oratop Utility
Download the
oratop.zip
file from My Oracle Support (MOS) at
https://support.oracle.com/epmos/faces/
MosIndex.jspx?_afrLoop=463945118311568&_afrWindowMode=0&_adf.ctrl-state=19ctrm4ozz_4
. Unzip the file
and set the appropriate permission to the
oratop
file, which is
chmod 755 oratop
on the Linux platform. Ensure the
following database
init
parameters:
timed_statistics
set to
TRUE
and the
statistics_level
set to
TYPICAL
. Also,
the following environmental settings need to be set on the local node before invoking the utility:
$ ORACLE_UNQNAME=<dbname>
$ ORACLE_SID=<instance_name1>
$ ORACLE_HOME=<db_home>
$ export LD_LIBRARY_PATH=$ORACLE_HOME/lib
$ export PATH=$ORACLE_HOME/bin:$PATH
The following example runs the utility and sets the interval to every ten seconds to refresh the window (default is
every three seconds):
$ratop -i 10
$oratop -t <tns_name_for_remote_db> -- to monitor remote database.
Input the database user name and password credentials when prompted. When no credentials are entered, it will
use the default user SYSTEM with MANAGER as the default password to connect to the database. If you are using a
non-system database user, ensure that the user has read permission on some of the dictionary dynamic views, such as
v_$SESSION, v_vSYSMETRIC, v_$INSTANCE, v_ $PROCESS, v_$SYSTEM_EVENT, and so on.
Figure
2-5
shows the output window of the
oratop
utility.
