Chat now with support
Chat with Support

Spotlight on SAP ASE 2.11 - Release Notes

Tablespace Analysis drilldown I/O Activity tab

The I/O Activity tab on the Tablespace Analysis drilldown provides a summary of I/O activity on the selected tablespace. The graphs show rates for the following:

  • Reads and writes that use the buffer pool

  • Direct reads and writes, which do not go through the buffer pool, but access the tablespace directly

The bottom of the drilldown lists average I/O times (in milliseconds) for both buffered and direct reads and writes. The average times are shown in milliseconds.

Troubleshooting high I/O activity

On the Database Analysis drilldown, you might notice consistently high rates for the following activities on specific databases:

  • Physical read rates (compared to logical read rates)

  • Synchronous read or write rates

  • Direct I/O rates for a database

These high rates might be indications of performance degradation since the activities involve disk I/O and slow-downs in query processing. Use the graphs listed above to pinpoint those tablespaces on which the high I/O activity is occurring.

Graphs

The following graphs on the I/O Activity tab keep track of the rates for I/O activity on the selected tablespace. These rates are plotted over consecutive monitoring intervals.

Data Read Rate

Index Read Rate

Index and Data Write Rate

Direct Read and Write Rate

 

 

Related topics

 

Related Documents

The document was helpful.

Select Rating

I easily found the information I needed.

Select Rating