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Spotlight on Oracle 10.6 - Getting Started Guide

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Sessions Page

Note: Oracle In-Memory is available for Oracle 12c Release 1 (12.1.0.2) and above. Data is displayed for Oracle instances where In-Memory is available and has been enabled. In-Memory is disabled by default.

Use this page to determine which sessions are benefiting from the use of the In-Memory column store.

To open the Sessions page

  1. Select the Spotlight on Oracle RAC connection in the Spotlight Browser.
  2. Click Configuration & Memory | In-Memory Page | Sessions Page.

Top Sessions by IM Scans Grid

Show the top 100 active sessions in descending order of their use of the in-memory column store (MB/GB).

Tip: Double-click on a Session to open that session in the Top Sessions drilldown.

Column Description
Instance Name The instance in the RAC cluster where the session is running.
SID The session identifier.
Oracle User The Oracle user who started the session.
OS User The operating system user for the client.
Machine The name of the computer on which the client is running.
Logical Reads (blocks/s) The rate at which data was read from SGA (not the In-Memory column store) in the preceding sampling interval.
IM Scans (blocks/s) The rate at which data (blocks) was read from the In-Memory column store in the preceding sampling interval.
CPU Time (ms/s)

The rate of CPU time (ms/s) used in the preceding sampling interval.

DB Time (ms/s)

The rate of time spent performing user calls on the session in the preceding sampling interval.

IM Scans (Mbytes/s) The rate at which data (Megabytes) was read from the In-Memory column store in the preceding sampling interval.
Disk Reads/s The number of disk reads per second in the preceding sampling interval.
PGA Memory (Mbytes) The amount of PGA memory used by the session.
Total IM Scans (Mbytes) Total number of megabytes scanned from the In-Memory column store since the session connected.
Container Name

The name of the container for the pluggable database.

Serial # The serial number of the session.
SidSerial The SID and Serial# combined and separated by '_'. This combination is always unique.
Total Consistent Gets Total number of consistent (query) mode reads since the session connected.
Total CPU Time (ms) Total amount of CPU time used since the session connected.
Total DB Block Gets Total number of block gets since the session connected.
Total DB Time (ms) Total amount of DB time (time spent processing user calls) since the session connected.
Total IM Scans (blocks) Total number of blocks scanned from the In-Memory column store since the session connected.
Total Physical Reads Total number of physical reads since the session connected.

 

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