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Oracle® Database Reference
11g Release 2 (11.2)

Part Number E25513-03
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REFRN30638

V$SESSION_BLOCKERS

V$SESSION_BLOCKERS displays the blocker sessions for each blocked session. Each row represents a blocked and blocker session pair. If a session is blocked by multiple sessions there will be multiple rows for that blocked session. The maximum number of blocker sessions displayed for a single blocked session is 30. If a session is not blocked by other sessions, then there will be no row in this view for that session.

Column Datatype Description
SID NUMBER Blocked session's Oracle session identifier
SESS_SERIAL# NUMBER Blocked session's Oracle session serial number
WAIT_ID NUMBER A number identifying the wait for the blocked session
WAIT_EVENT NUMBER Resource or event number for which the blocked session is waiting
WAIT_EVENT_TEXT VARCHAR2(64) Resource or event for which the blocked session is waiting
BLOCKER_INSTANCE_ID NUMBER Blocker session's instance identifier
BLOCKER_SID NUMBER Blocker session's Oracle session identifier
BLOCKER_SESS_SERIAL# NUMBER Blocker session's Oracle session serial number

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