bsm_sqlsvrperfomanceoptimizationguide

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BSM SQL Server Database Performance Optimization Guide Page 3


Table of Contents

1 Database Performance Optimization Overview ........................................................................................... 41.1 New Installation, BSM 11.5 or Later, SQL Server Enterprise Edition ................................................................ 41.2 Upgrade Installation, BSM 11.0 or Later, SQL Server Enterprise Edition ........................................................ 41.3 New or Upgrade Installation, BSM (any release), SQL Server Standard Edition .......................................... 4

2 Setting Up a Data Purging Schedule ................................................................................................................ 53 Rebuilding Database Indexes ............................................................................................................................. 74 Determining Database Partitioning ............................................................................................................... 16


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2 Setting Up a Data Purging ScheduleTo create a data purge schedule In the BSM Configuration Client, choose Server-> Task Scheduling.

The Task Schedulingview appears, as shown in the following illustration:

For each of the tables listed on the left, you can define a data purge schedule. On the right, you can setpurging for this table to Activeby selecting the box, and then setting the time in which purging for thistable should occur.

Purging for each of these tables should be staggered across different times and/or days to ensure thateach task completes successfully.

On the Purge Configurationtab for each table, you can define how long to retain data before it ispurged. Tables have either a single option or a more detailed configuration.

For statistics appearing in the various statistics tables, you can set the data retention periods to limitdatabase growth and improve overall database performance. The recommended retention periods forthe following types of statistics are shown in the following list and screen shot:

Hourly Stats: 30 days

Daily Stats: 60 days


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Weekly Stats: 12 weeks

Monthly Stats: 12 months

Yearly Stats: 5 years

Tip: Although setting the retention period of statistics in the various statistics tables to therecommended values will help limit database growth and improve the overall performance of yourdatabase, you may notice a slight increase in the time it takes for data stored in statistics tables to bepurged from the database. To assess the impact of setting the retention period values to therecommended values, review the Purge Jobs section of the Health Report and, if necessary, rescheduleyour purge job to an off-peak time.


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3 Rebuilding Database IndexesProperly configured database indexes improve query response times and need to be maintainedperiodically as they become fragmented much like how a hard disk becomes fragmented after frequentuses. When this happens, the database indexes need to be rebuilt to improve ensure optimal

performance.

The steps below show how to setup a maintenance task in Microsoft SQL Server to rebuild the indexeson a schedule. The screenshots and instructions apply to Microsoft SQL Server 2008 R2, so the actualsteps may vary slightly depending on your exact version.

1. In the Microsoft SQL Server Management Studio Object Explorer, choose Management > MaintenancePlans. Any existing Maintenance Plans appear.

2. Right-click the Maintenance Plansfolder and select Maintenance Plan Wizard.The Maintenance Plan Wizardappears.


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3. Click Next.The Select Plan Propertiespage appears.


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4. Type a name for the maintenance plan, and then click Changeto set up the job schedule, asshown in the following illustration:


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Note: You can define how often you wish to run the plan. In the schedule above, it has beenconfigured to run every Sunday at midnight. Because rebuilding indexes will put some load onthe database server, it is recommended to schedule this during off peak times so that there willbe minimal impact on performance.

5. Click OKonce you have defined your schedule, and then Nextto go to the next page of thewizard.

6. On the window that opens, you can define how often you wish to run the plan. In the scheduleabove, it has been configured to run every Sunday at midnight.

7. Because rebuilding indexes will put some load on the database server, Compuwarerecommends to schedule this during off peak times to reduce impact on performance.

8. Click OKonce you have defined your schedule, and then Next.The Select Maintenance Taskspage appears.


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9. Select Rebuild Index, and then click Next.10. You are given the option of selecting the order in which to run the tasks. If you select more than

one, select the desired order, and then press Next.The Define Rebuild Index Taskpage appears.


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11. Select your BSM database from the list and accept the remaining defaults on the page.12. Click Next.

The Select Report Optionspage appears.


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13. Choose to write a report to a text file or sending to an email recipient. Click Nextonce you havemade the desired settings. The Complete the Wizardpage appears.


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14. Review the summary, and then click Finish.The Maintenance Plan Wizard Progress page appears.


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15.

Your new maintenance task will show in the list of tasks. If you wish to run the taskimmediately, right-click the task and select Execute. Otherwise, the task will be run at thescheduled time.


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4 Determining Database PartitioningTo determine if your existing database is partitioned, execute the following SQL statement against yourdatabase:

SELECT distinct TableName from PF_PS_RANGE_TABLE_FILEGROUPView;

If the query produces a list of tables, the existing database is partitioned. If the query does not produceany results, the existing database is not partitioned.

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