Tuesday, August 12, 2008

V$SHARED_SERVER

Oracle 11gR1

V$SHARED_SERVER displays information on the shared server processes.

Column

Datatype

Description

NAME

VARCHAR2(4)

Name of the server

PADDR

RAW(4 | 8)

Server's process address

STATUS

VARCHAR2(16)

Server status:

EXEC - Executing SQL

WAIT (ENQ) - Waiting for a lock

WAIT (SEND) - Waiting to send data to user

WAIT (COMMON) - Idle; waiting for a user request

WAIT (RESET) - Waiting for a circuit to reset after a break

QUIT - Terminating

MESSAGES

NUMBER

Number of messages processed

BYTES

NUMBER

Total number of bytes in all messages

BREAKS

NUMBER

Number of breaks

CIRCUIT

RAW(4 | 8)

Address of the circuit currently being serviced

IDLE

NUMBER

Total idle time (in hundredths of a second)

BUSY

NUMBER

Total busy time (in hundredths of a second)

REQUESTS

NUMBER

Total number of requests taken from the common queue in this server's lifetime

Note:

1.

select * from V$SHARED_SERVER;

NAME

PADDR

STATUS

MESSAGES

BYTES

BREAKS

CIRCUIT

IDLE

BUSY

REQUESTS

S000

00000007B96EAE30

WAIT(COMMON)

0

0

0

00

380959378

0

0

2. The following views are useful for obtaining information about shared server configuration and for monitoring performance.

View

Description

V$DISPATCHER

Provides information on the dispatcher processes, including name, network address, status, various usage statistics, and index number.

V$DISPATCHER_CONFIG

Provides configuration information about the dispatchers.

V$DISPATCHER_RATE

Provides rate statistics for the dispatcher processes.

V$QUEUE

Contains information on the shared server message queues.

V$SHARED_SERVER

Contains information on the shared servers.

V$CIRCUIT

Contains information about virtual circuits, which are user connections to the database through dispatchers and servers.

V$SHARED_SERVER_MONITOR

Contains information for tuning shared server.

V$SGA

Contains size information about various system global area (SGA) groups. May be useful when tuning shared server.

V$SGASTAT

Contains detailed statistical information about the SGA, useful for tuning.

V$SHARED_POOL_RESERVED

Lists statistics to help tune the reserved pool and space within the shared pool.

Oracle dynamic performance views

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