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Enq:tx-row Lock contention parameter P1,P2,P3 description

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Enq:tx-row lock contention three parameters, for example, the following wait event

* P1 = Name|mode <<<<<<< name are generally 0x5458 for TX lock; Mode 4 for Shared lock mode for 6 for exclusive lock
* P2 = usn<<16 | Slots <<<<<<< V$transaction. Xidusn and V$transaction. Xidslot

* P3 = sequence <<<<<<< v$transaction. xidseq It 's not hard to see that P2 and P3 are actually part of XID .

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Enq:tx-row Lock contention parameter P1,P2,P3 description

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