Determine Performance During Peak Time

These are suggested steps to determine Oracle FS System performance using the Oracle FS System Manager (GUI) during a peak usage period to capture statistics. The statistics are used to determine the overall health of the system and of specific LUNs.

Prerequisite:

Knowledge of LUNs and drive groups including host-to-LUN mapping.

To determine latency for a selected LUN, navigate to SAN > Statistics and Trending > LUNs and select the LUN. You can choose one of these methods to view the data:
1. You can view the I/O latency data from the LUNs Overview page.
2. For additional I/O latency data from the LUNs Overview page, select a LUN and then select Actions > View Details for more information.
3. If you want to view the I/O latency in a real-time graph, select Actions > LUN Real Time Statistics. From the LUN Real Time Statistics, click Add Graph, select Total Latency, and click OK.
To determine the IOPS for a selected LUN, navigate to SAN > Statistics and Trending > LUNs and select the LUN.
1. You can view the IOPS data from the LUNs page.
2. You can select Actions > View Details to display more details.
3. If you want to view the IOPS in a real time graph, select Actions > LUN Real Time Statistics From the LUN Real Time Statistics, click Add Graph, select Total IO Per Second, and click OK.
To determine the percentage the CPU is busy on the Controller, navigate to System > Reporting and Statistics > CPU Statistics.
1. Select the Controller.
2. Select Actions > Controller CPU Real Time Statistics.
3. Click Add Graph and select Total Percent Time Busy.
4. Click OK.
To determine the IOPS for FC ports, navigate to SAN > Statistics and Trending > Controller Protocols and select the Controller.
1. Select Actions > View Details to display IOPS data.
2. If you want to view the IOPS in a real time graph, select Actions > FC Port Real Time Statistics.
3. From the FC Port Real Time Statistics, click Add Graph, select Total IO Per Second, and click OK.
To determine the latency of a drive group, navigate to System > Reporting and Statistics > Drive Group Statistics.
1. Select the Controller.
2. Select Actions > Drive Group Real Time Statistics.
3. Click Add Graph, select Total Latency.
4. Click OK.

By checking latency and IOPS on the key LUNs, you can determine if performance meets performance objectives. If these values appear to be problematic, the other values already charted provide you with information on where to begin to identify the cause. The FC port information can provide insight into FC throughput. Latencies on LUNs or drive groups should not exceed a limit established by the administrator’s guidelines. Based on experience, you can identify LUN values that are high or low.