1. Database Reference
  2. Dynamic Performance Views
  3. Dynamic Performance (V$) Views: V$ACCESS to V$HVMASTER_INFO
  4. V$DISPATCHER_RATE

7.189 V$DISPATCHER_RATE

V$DISPATCHER_RATE displays rate statistics for a number of activities performed by the dispatcher processes.

Collected samples have an activity-specific "time-to-live" (TTL_* columns). Statistics are reported over the following two types of time intervals:

  • Current statistics (CUR_ columns)

    Current statistics use samples collected over the most recent time-to-live interval.

  • Historical statistics (AVG_ and most of the MAX_ columns)

    Historical statistics make use of all samples that are no longer current.

At the time of collection, a sample is current. After the time-to-live has elapsed, the sample becomes historical. Each type of activity has a specific scale (represented by the SCALE_* columns) at which the statistics are reported.

Column Datatype Description

NAME

VARCHAR2(4)

Name of the dispatcher process

PADDR

RAW(4 | 8)

Address of the dispatcher process

CUR_LOOP_RATE

NUMBER

Rate at which the dispatcher has been iterating through its dispatching loop, reported over the past TTL_LOOPS, in iterations/SCALE_LOOPS

CUR_EVENT_RATE

NUMBER

Rate at which the dispatcher has been processing dispatcher events, reported over the past TTL_LOOPS, in events/SCALE_LOOPS. Such dispatcher events include network events and shared server requests.

CUR_EVENTS_PER_LOOP

NUMBER

Average number of events the dispatcher has been processing in each iteration through its dispatching loop, reported over the past TTL_LOOPS, in events/iteration

CUR_MSG_RATE

NUMBER

Rate at which the dispatcher has been relaying messages between clients and shared servers, reported over the past TTL_MSG, in messages/SCALE_MSG

CUR_SVR_BUF_RATE

NUMBER

Rate at which the dispatcher has been relaying buffers to shared servers, reported over the past TTL_SVR_BUF, in messages/SCALE_SVR_BUF

CUR_SVR_BYTE_RATE

NUMBER

Rate at which the dispatcher has been relaying data to shared servers, reported over the past TTL_SVR_BUF, in bytes/SCALE_SVR_BUF

CUR_SVR_BYTE_PER_BUF

NUMBER

Average number of data types in each buffer relayed to shared servers, reported over the past TTL_SVR_BUF, in bytes/buffer

CUR_CLT_BUF_RATE

NUMBER

Rate at which the dispatcher has been relaying buffers to clients, reported over the past TTL_CLT_BUF, in buffers/SCALE_CLT_BUF

CUR_CLT_BYTE_RATE

NUMBER

Rate at which the dispatcher has been relaying data to clients, reported over the past TTL_CLT_BUF, in bytes/SCALE_CLT_BUF

CUR_CLT_BYTE_PER_BUF

NUMBER

Average number of data bytes in each buffer relayed to clients, reported over the past TTL_CLT_BUF, in bytes/buffer

CUR_BUF_RATE

NUMBER

Rate at which the dispatcher has been relaying buffers to either clients or shared servers, reported over the past TTL_BUF, in bytes/SCALE_BUF

CUR_BYTE_RATE

NUMBER

Rate at which the dispatcher has been relaying data to either clients or shared servers, reported over the past TTL_BUF, in bytes/SCALE_BUF

CUR_BYTE_PER_BUF

NUMBER

Average number of data bytes in each buffer relayed to either clients or shared servers, reported over the past TTL_BUF, in bytes/buffer

CUR_IN_CONNECT_RATE

NUMBER

Rate at which the dispatcher has been accepting incoming client connections, reported over the past TTL_IN_CONNECT, in connections/SCALE_IN_CONNECT

CUR_OUT_CONNECT_RATE

NUMBER

Rate at which the dispatcher has been establishing outbound connections, reported over the past TTL_OUT_CONNECT, in connections/SCALE_OUT_CONNECT

CUR_RECONNECT_RATE

NUMBER

In a connection pooling setup, the rate at which clients have been reconnecting to the dispatcher, reported over the past TTL_RECONNECT, in reconnections/SCALE_RECONNECT

MAX_LOOP_RATE

NUMBER

Maximum rate at which the dispatcher has ever iterated through its dispatching loop, reported in iterations/SCALE_LOOPS, over the dispatcher's lifetime excluding the past TTL_LOOPS

MAX_EVENT_RATE

NUMBER

Maximum rate at which the dispatcher has ever processed dispatcher events, reported in events/SCALE_LOOPS, over the dispatcher's lifetime excluding the past TTL_LOOPS

MAX_EVENTS_PER_LOOP

NUMBER

Maximum number of events the dispatcher has ever processed in one iteration through its dispatching loop, reported in events/iteration, over the dispatcher's lifetime

MAX_MSG_RATE

NUMBER

Maximum rate at which the dispatcher has ever relayed messages between clients and shared servers, reported in messages/SCALE_MSG, over the dispatcher's lifetime excluding the past TTL_MSG

MAX_SVR_BUF_RATE

NUMBER

Maximum rate at which the dispatcher has ever relayed buffers to shared servers, reported in buffers/SCALE_SVR_BUF, over the dispatcher's lifetime excluding the past TTL_SVR_BUF

MAX_SVR_BYTE_RATE

NUMBER

Maximum rate at which the dispatcher has ever relayed data to shared servers, reported in bytes/SCALE_SVR_BUF, over the dispatcher's lifetime excluding the past TTL_SVR_BUF

MAX_SVR_BYTE_PER_BUF

NUMBER

Maximum number of data bytes the dispatcher has ever relayed in one buffer to a client, reported in bytes/buffer, over the dispatcher's lifetime

MAX_CLT_BUF_RATE

NUMBER

Maximum rate at which the dispatcher has ever relayed buffers to either clients or shared servers, reported in buffers/SCALE_CLT_BUF, over the dispatcher's life time excluding the past TTL_CLT_BUF

MAX_CLT_BYTE_RATE

NUMBER

Maximum rate at which the dispatcher has ever relayed buffers to clients, reported in bytes/SCALE_CLT_BUF, over the dispatcher's lifetime excluding the last TTL_CLT_BUF

MAX_CLT_BYTE_PER_BUF

NUMBER

Maximum number of data bytes the dispatcher has ever relayed in one buffer to a client, reported in bytes/buffer, over the dispatcher's lifetime

MAX_BUF_RATE

NUMBER

Maximum rate at which the dispatcher has ever relayed buffers to either clients or shared servers, reported in buffers/SCALE_BUF, over the dispatcher's lifetime, excluding the past TTL_BUF

MAX_BYTE_RATE

NUMBER

Maximum rate at which the dispatcher has ever relayed data to either clients or shared servers, reported in bytes/SCALE_BUF, over the dispatcher's lifetime excluding the past TTL_BUF

MAX_BYTE_PER_BUF

NUMBER

Maximum number of data bytes the dispatcher has ever relayed in one buffer to either a client or a shared server, reported in bytes/buffer, over the dispatcher's lifetime

MAX_IN_CONNECT_RATE

NUMBER

Maximum rate at which the dispatcher has ever accepted incoming client connections, reported in connections/SCALE_IN_CONNECT, over the dispatcher's lifetime excluding the past TTL_IN_CONNECT

MAX_OUT_CONNECT_RATE

NUMBER

Maximum rate at which the dispatcher has ever established outbound connections, reported in connections/SCALE_OUT_CONNECT, over the dispatcher's lifetime excluding the past TTL_OUT_CONNECT

MAX_RECONNECT_RATE

NUMBER

In a connection pooling setup, the maximum rate at which clients have ever reconnected to this dispatcher, reported in reconnections/SCALE_RECONNECT, over the dispatcher's lifetime excluding the past TTL_RECONNECT

AVG_LOOP_RATE

NUMBER

Historical average rate at which the dispatcher has iterated through its dispatching loop, reported in iterations/SCALE_LOOPS, over the dispatcher's lifetime excluding the past TTL_LOOPS

AVG_EVENT_RATE

NUMBER

Historical average rate at which the dispatcher has processed dispatcher events, reported in events/SCALE_LOOPS, over the dispatcher's lifetime excluding the past TTL_LOOPS

AVG_EVENTS_PER_LOOP

NUMBER

Historical average number of events the dispatcher has processed in one iteration through its dispatching loop, reported in events/iteration, over the dispatcher's lifetime excluding the past TTL_LOOPS

AVG_MSG_RATE

NUMBER

Historical average rate at which the dispatcher has relayed messages between clients and shared servers, reported in messages/SCALE_MSG, over the dispatcher's lifetime excluding the past TTL_MSG

AVG_SVR_BUF_RATE

NUMBER

Historical average rate at which the dispatcher has relayed buffers to shared servers, reported in buffers/SCALE_SVR_BUF, over the dispatcher's lifetime excluding the past TTL_SVR_BUF

AVG_SVR_BYTE_RATE

NUMBER

Historical average rate at which the dispatcher has relayed data to shared servers, reported in bytes/SCALE_SVR_BUF, over the dispatcher's lifetime excluding the past TTL_SVR_BUF

AVG_SVR_BYTE_PER_BUF

NUMBER

Historical average number of data bytes per buffer the dispatcher has relayed to shared servers, reported in bytes/buffer, over the dispatcher's lifetime excluding the past TTL_SVR_BUF

AVG_CLT_BUF_RATE

NUMBER

Historical average rate at which the dispatcher has relayed buffers to clients, reported in buffers/SCALE_CLT_BUF, over the dispatcher's lifetime excluding the past TTL_CLT_BUF

AVG_CLT_BYTE_RATE

NUMBER

Historical average rate at which the dispatcher has relayed data to clients, reported in bytes/SCALE_CLT_BUF, over the dispatcher's lifetime excluding the past TTL_CLT_BUF

AVG_CLT_BYTE_PER_BUF

NUMBER

Historical average number of data bytes per buffer the dispatcher has relayed to clients, reported in bytes/buffer, over the dispatcher's lifetime excluding the past TTL_CLT_BUF

AVG_BUF_RATE

NUMBER

Historical average rate at which the dispatcher has relayed buffers to either clients or shared servers, reported in buffers/SCALE_BUF, over the dispatcher's lifetime excluding the past TTL_BUF

AVG_BYTE_RATE

NUMBER

Historical average rate at which the dispatcher has relayed data to either clients or shared servers, reported in bytes/SCALE_BUF, over the dispatcher's lifetime excluding the past TTL_BUF

AVG_BYTE_PER_BUF

NUMBER

Historical average number of data bytes per buffer the dispatcher has relayed to either clients or shared servers, reported in bytes/buffer, over the dispatcher's lifetime excluding the past TTL_BUF

AVG_IN_CONNECT_RATE

NUMBER

Historical average rate at which the dispatcher has accepted incoming client connections, reported in connections/SCALE_IN_CONNECT, over the dispatcher's lifetime excluding the past TTL_IN_CONNECT

AVG_OUT_CONNECT_RATE

NUMBER

Historical average rate at which the dispatcher has established outbound connections, reported in connections/SCALE_OUT_CONNECT, over the dispatcher's lifetime excluding the past TTL_OUT_CONNECT

AVG_RECONNECT_RATE

NUMBER

In a connection pooling setup, the historical average rate at which clients have reconnected to this dispatcher, reported in reconnections/SCALE_RECONNECT, over the dispatcher's lifetime excluding the past TTL_RECONNECT

TTL_LOOPS

NUMBER

Time-to-live for "loops" samples, reported in hundredths of a second. Default is 10 minutes.

TTL_MSG

NUMBER

Time-to-live for "messages" samples, reported in hundredths of a second. Default is 10 seconds.

TTL_SVR_BUF

NUMBER

Time-to-live for "buffers to servers" samples, reported in hundredths of a second. Default is 1 second.

TTL_CLT_BUF

NUMBER

Time-to-live for "buffers to clients" samples, reported in hundredths of a second. Default is 1 second.

TTL_BUF

NUMBER

Time-to-live for "buffers to clients/servers" samples, reported in hundredths of a second. Default is 1 second.

TTL_IN_CONNECT

NUMBER

Time-to-live for "inbound connections" samples, reported in hundredths of a second. Default is 10 minutes.

TTL_OUT_CONNECT

NUMBER

Time-to-live for "outbound connections" samples, reported in hundredths of a second. Default is 10 minutes.

TTL_RECONNECT

NUMBER

Time-to-live for "reconnections" samples, reported in hundredths of a second. Default is 10 minutes.

SCALE_LOOPS

NUMBER

Scale for "loops" statistics, reported in hundredths of a second. Default is 1 minute.

SCALE_MSG

NUMBER

Scale for "messages" statistics, reported in hundredths of a second. Default is 1 second.

SCALE_SVR_BUF

NUMBER

Scale for "buffers to servers" statistics, reported in hundredths of a second. Default is 1/10 second.

SCALE_CLT_BUF

NUMBER

Scale for "buffers to clients" statistics, reported in hundredths of a second. Default is 1/10 second.

SCALE_BUF

NUMBER

Scale for "buffers to clients/servers" statistics, reported in hundredths of a second. Default is 1/10 second.

SCALE_IN_CONNECT

NUMBER

Scale for "inbound connections" statistics, reported in hundredths of a second. Default is 1 minute.

SCALE_OUT_CONNECT

NUMBER

Scale for "outbound connections" statistics, reported in hundredths of a second. Default is 1 minute.

SCALE_RECONNECT

NUMBER

Scale for "reconnections" statistics, reported in hundredths of a second. Default is 1 minute.

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data