Database Summary

Use this display to investigate the performance and health of a database.

Select an Instance and a Database. Check main performance statistics such as database load, Commits per second, Processing Time Breakdown and Wait Time Breakdown

View trend graphs tracing Commits and Rollbacks per second, Wait and Response times, among others.

Choose a Time Range or click ellipse_button00064.gif to specify your own.

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Instance:

Choose an instance.

Database:

Choose a database.

 

Connected

When checked, the database is connected.

 

Expired

When checked, performance data has not been received within the time specified by your administrator for the Expire Time.

If your administrator has also set the Delete Time, this row will be deleted if no data is received within the time specified for deletion.

 

# Partitions

The number of partitions on the database.

Stats for Last 1 Second Interval

 

 

#

#/sec

 

Activites

Total number of activities in the last 1 second.

Value per second.

 

App Requests

Total number of application requests in the last 1 second.

Value per second.

 

Commits

Total number of commits in the last 1 second.

Value per second.

 

Rollbacks

Total number of rollbacks in the last 1 second.

Value per second.

Avg # per Activity

 

Deadlocks

The average number of deadlocks per activity in the last 1 second.

 

Lock Escal

The average number of lock escalations per activity in the last 1 second.

 

Lock Timeouts

The average number of lock timeouts per activity in the last 1 second.

 

Lock Waits

The average number of lock waits per activity in the last 1 second.

Time Spent in DB2

 

% Processing

 

 

 

 

% Waiting

 

 

 

Process Time % Breakdown 

Shows the percentage of total processing time for the instance used by the following types of actions:

  • Section

  • Sort

  • Transaction

  • Utilities

Wait Time % Breakdown

Shows the percentage of total wait time used for the instance categorized by:

  • Activity

  • IO

  • Network

  • Locks

 

BP Hit Ratio %

The current buffer pool hit ratio, which is the total number of pool hits divided by the total number of buffer pool lookups.

 

Rows Read / Rows Returned

The number of rows read per number of rows returned.

Overall ExecutionTrends

For the selected datbase, trend graphs trace as follows:

  • Commits/sec Traces the number of commits per second.

  • Rollbacks/sec Traces the number of rollbacks per second.

  • Network Wait % Traces the percentage of wait time used by network operations.

  • I/O Wait % Traces the percentage of wait time used by I/O operations.

  • Response Time Traces the total amount of wait time.

 

Log Scale

Select to enable a logarithmic scale. Use Log Scale to see usage correlations for data with a wide range of values. For example, if a minority of your data is on a scale of tens, and a majority of your data is on a scale of thousands, the minority of your data is typically not visible in non-log scale graphs. Log Scale makes data on both scales visible by applying logarithmic values rather than actual values to the data.

 

 

Base at Zero

Select to use zero (0) as the Y axis minimum for all graph traces.

 

Time Range

Select a time range from the drop down menu varying from 2 Minutes to Last 7 Days, or display All Data. By default, the time range end point is the current time. To enter a specific time range, click the associated ellipsis button ellipse_button00066.gif.

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To change the time range click the Open Calendar button calendar_button00068.gif, choose the date and time, then click OK. Or, enter the date and time in the text field using the following format: MMM dd, YYYY HH:MM:ss (for example, Aug 21, 2011 12:24 PM) and click Apply. Use the Navigation Arrows button_forwardback00069.gifto move forward or backward one time period (the time period selected from the Time Range drop-down menu). Click Restore to Now to reset the time range end point to the current time.