Written by Porus Homi Havewala In this article, we will go through the General Monitoring capabilities of Enterprise Manager, as experienced by Enterprise Manager Administrators or Cloud Administrators. Let us see what Enterprise Manager can help them with, in their day to day activities of monitoring an enterprise. Target Drill Down The Enterprise Summary view of Enterprise Manager is frequently chosen as the Home page by Enterprise Manager Administrators. On this page itself, a lot of monitoring information is displayed as shown in the screenshot below. The Summary section shows an overview of all the Targets that are monitored. In this particular system, there are 649 monitored targets. The Status of the Targets is shown in a Pie graph, which displays the Up, Down, or Unknown Status Targets. It is possible for the Administrator to drill down immediately to the Down Status Targets. The Down Status Targets appear in a list, and are grouped by Target Type (Databases, Middleware, Groups, Systems, Services) or by Target Version. We can drill down further into the Database Instances which are Down. The view changes to display only the Databases which are Down. The grouping is by Target Version, Platform, or Operating System. To find out what is wrong with any of the Databases, simply click on the Database name. From the Informational message, you can understand that the password has expired, so the database is not able to be monitored. Simply change the password in this case. Likewise, if there are any other reasons for a database to be down, such as “Archiver stuck” or “Fast Recovery Area out of space”, they would be displayed here and it would be very easy for the DBA to investigate the error and fix the issue. Move back to the list of Down Targets. There are three WebLogic Servers which are “Down” in this list. Click on the WebLogic Server link. Out of the three servers that are down, click on the Admin Server to drill down further. This brings up the Admin Server Home page as seen below. Simply click on "Start Up" to fix this issue and restart the Admin Server. We have seen the list of Down Status Targets. To view all the different types of Targets as monitored by Enterprise Manager, select Targets..All Targets from the Enterprise Manager menu. Click on Database Instance to bring up the list of 13 Database Instance Targets as seen below. At a glance, all the databases being monitored by Enterprise Manager are visible on this page. Targets Status - whether Up, Down or Unknown is clearly seen. You can click on the database name to drill down further into the database home page, where you can perform administration and management of your database in Enterprise Manager. Host Monitoring Select Targets..Hosts. This brings up the list of all the hosts as seen in the screen below. The list of host targets that are monitored by this Enterprise Manager system clearly shows the status, whether Up, Down or Unknown, as well as performance information about each host - such as CPU Utilization, Memory Utilization, Total IO/sec, the Incidents that have occurred, any Compliance Violations and so on. If you drill down into one of the hosts, the Home page of that host is displayed as follows. On the Home page of the host, performance graphs display the CPU Utilization, Memory Utilization, Filesystem Usage, Network Utilization and so on. Configuration information about the host is displayed, along with Incidents and Job Activity. This is a good page to get an overall impression of the host target, and you can drill down further to examine the detailed configuration, the compliance details, and so on. From the Host Target menu, there is a menu option specifically meant for monitoring, as can be seen below. Select Host..Monitoring..CPU Details from the Host Target menu. This brings up the CPU Details page for the host. On the CPU Details page, you can observe the CPU Utilization over time, the CPU I/O Wait, and the CPU Load. The yellow and red lines signify the warning and critical thresholds that have been set for that metric, for example, CPU Utilization. If looking at the Real Time performance (as opposed to historical), the Top 10 Processes (ordered by CPU) are also displayed in the lower half of the screen. This helps in performance trouble shooting. Select Host..Monitoring..Memory Details from the Host Target menu. The Memory Details page for the host displays the Memory Page Scan Rate (pages/sec), the Memory Utilization (%), and the Swap Utilization (%). If looking at Real Time information (instead of historical), the Top 10 Processes (ordered by Memory) are also displayed to aid in trouble shooting. Select Host..Monitoring..Disk Details from the Host Target menu. The Disk Details page displays the Total Disk I/O made across all disks, and the Maximum Average Disk I/O Service Time (ms) amongst all disks. The Top Disk Devices (ordered by % Busy) are also seen in the lower half of the screen. Select Host..Monitoring..Program Resource Utilization from the Host Target menu. On this page it is possible to monitor programs as to their process count, CPU Utilization, and Maximum Resident Memory Size (MB). This is done as per any Program Name and Owner combination. By default, all programs and all owners are seen as one line. You can set thresholds for each of the Program Names and Owner combinations, by clicking on the link provided. We will next look at the thresholds, and then continue looking at the general monitoring capabilities of Enterprise Manager in Part II of this article.
↧
