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Oracle® Database Reference
11g Release 1 (11.1)

B28320-03
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V$STREAMS_CAPTURE

V$STREAMS_CAPTURE displays information about each capture process.

Column Datatype Description
SID NUMBER Session identifier of the capture process
SERIAL# NUMBER Session serial number of the capture process session
CAPTURE# NUMBER Capture process number. A capture process is an Oracle background process, prefixed by cp.
CAPTURE_NAME VARCHAR2(30) Name of the capture process
LOGMINER_ID NUMBER Session ID of the LogMiner session associated with the capture process
STARTUP_TIME DATE Time when the capture process was last started
STATE VARCHAR2(551) State of the capture process:
  • INITIALIZING

  • CAPTURING CHANGES

  • EVALUATING RULE

  • ENQUEUING MESSAGE

  • SHUTTING DOWN

  • ABORTING

  • CREATING LCR

  • WAITING FOR DICTIONARY REDO

  • WAITING FOR REDO

  • PAUSED FOR FLOW CONTROL

  • DICTIONARY INITIALIZATION

  • WAITING FOR APPLY TO START

  • CONNECTING TO APPLY DATABASE

  • WAITING FOR PROPAGATION TO START

TOTAL_PREFILTER_DISCARDED NUMBER Total number of prefiltered messages discarded
TOTAL_PREFILTER_KEPT NUMBER Total number of prefiltered messages kept
TOTAL_PREFILTER_EVALUATIONS NUMBER Total number of prefilter evaluations
TOTAL_MESSAGES_CAPTURED NUMBER Total number of redo entries passed by LogMiner to the capture process for detailed rule evaluation since the capture process last started. A capture process converts a redo entry into a message and performs detailed rule evaluation on the message when capture process prefiltering cannot discard the change.
CAPTURE_TIME DATE Time when the most recent message was captured
CAPTURE_MESSAGE_NUMBER NUMBER Number of the most recently captured message
CAPTURE_MESSAGE_CREATE_TIME DATE Creation time of the most recently captured message
TOTAL_MESSAGES_CREATED NUMBER Count associated with ELAPSED_LCR_TIME to calculate rate
TOTAL_FULL_EVALUATIONS NUMBER Count associated with ELAPSED_RULE_TIME to calculate rate
TOTAL_MESSAGES_ENQUEUED NUMBER Total number of messages enqueued since the capture process was last started
ENQUEUE_TIME DATE Time when the last message was enqueued
ENQUEUE_MESSAGE_NUMBER NUMBER Number of the last enqueued message
ENQUEUE_MESSAGE_CREATE_TIME DATE Creation time of the last enqueued message
AVAILABLE_MESSAGE_NUMBER NUMBER For local capture, the last redo SCN flushed to the logfiles. For downstream capture, the last SCN added to LogMiner via the archive logs.
AVAILABLE_MESSAGE_CREATE_TIME DATE For local capture, the time the SCN was written to the logfile. For downstream capture, the time the most recent archive log (containing the most recent SCN) was added to LogMiner.
ELAPSED_CAPTURE_TIME NUMBER Elapsed time (in hundredths of a second) scanning for changes in the redo log since the capture process was last started
ELAPSED_RULE_TIME NUMBER Elapsed time (in hundredths of a second) evaluating rules since the capture process was last started
ELAPSED_ENQUEUE_TIME NUMBER Elapsed time (in hundredths of a second) enqueuing messages since the capture process was last started
ELAPSED_LCR_TIME NUMBER Elapsed time (in hundredths of a second) creating logical change records (LCRs) since the capture process was last started
ELAPSED_REDO_WAIT_TIME NUMBER Elapsed time (in hundredths of a second) spent by the capture process in the WAITING FOR REDO state
ELAPSED_PAUSE_TIME NUMBER Elapsed flow control pause time (in hundredths of a second)
STATE_CHANGED_TIME DATE Time at which the state of the capture process changed
APPLY_NAME VARCHAR2(30) Reserved for internal use
APPLY_DBLINK VARCHAR2(128) Reserved for internal use
APPLY_MESSAGES_SENT NUMBER Reserved for internal use
APPLY_BYTES_SENT NUMBER Reserved for internal use
OPTIMIZATION NUMBER Indicates whether a capture process uses combined capture and apply (greater than zero) or a capture process does not use combined capture and apply (0)

Note:

The ELAPSED_CAPTURE_TIME, ELAPSED_RULE_TIME, ELAPSED_ENQUEUE_TIME, ELAPSED_LCR_TIME, and ELAPSED_REDO_WAIT_TIME columns are only populated if the TIMED_STATISTICS initialization parameter is set to true, or if the STATISTICS_LEVEL initialization parameter is set to TYPICAL or ALL.