Merge branch 'main' into NicolaCimitile-patch-5

Author: mfioramo

data-platform/core-converged-db/database-23ai/priority-transactions/README.md

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+# Priority Transactions
+
+A transaction acquires a row lock for each row modified by one of the following statements: INSERT, UPDATE, DELETE, MERGE, and SELECT ... FOR UPDATE. The row lock exists until the transaction commits or rolls back.
+Transactions can hold row locks for a long duration in certain cases. Traditionally, when a transaction is blocked on a row lock by another transaction for a long time, the database administrator manually terminates the blocking transaction by using the ALTER SYSTEM KILL SESSION command. 
+
+Starting with Oracle Database release 23, applications can assign priorities (LOW, MEDIUM, HIGH) to transactions. If a low-priority transaction blocks a high-priority transaction on row locks, Oracle database will automatically roll back the low-priority transaction to let the high-priority transaction(s) progress. The database administrator needs to configure the time after which the low-priority transaction is rolled back.
+ 
+Reviewed: 08.05.2024
+
+# Useful Links
+
+## Documentation
+
+- [Database Administrator’s Guide](https://docs.oracle.com/en/database/oracle/oracle-database/23/admin/managing-transactions.html#GUID-8B71D725-24E9-4AE1-B9FA-BAC291923EAC)
+- [Database Reference TXN_PRIORTY](https://docs.oracle.com/en/database/oracle/oracle-database/23/refrn/TXN_PRIORITY.html)
+- [Database Reference PRIORITY_TXNS_HIGH_WAIT_TARGET](https://docs.oracle.com/en/database/oracle/oracle-database/23/refrn/PRIORITY_TXNS_HIGH_WAIT_TARGET.html#GUID-B835CD39-221B-40CF-8F59-098101FD2D74)
+- [Database Reference PRIORITY_TXNS_MEDIUM_WAIT_TARGET](https://docs.oracle.com/en/database/oracle/oracle-database/23/refrn/PRIORITY_TXNS_MEDIUM_WAIT_TARGET.html#GUID-7FC69016-983B-460E-A296-0B41247F1A52)
+- [Database Reference PRIORITY_TXNS_MODE](https://docs.oracle.com/en/database/oracle/oracle-database/23/refrn/PRIORITY_TXNS_MODE.html#GUID-454171AA-19AA-44FC-A18D-0DE7C4676190)
+
+
+# Team Publications
+
+- [Priority Transactions with high, medium and low priority](https://blogs.oracle.com/coretec/post/automatic-transaction-rollback-in-23c)
+
+# License
+
+Copyright (c) 2024 Oracle and/or its affiliates.
+
+Licensed under the Universal Permissive License (UPL), Version 1.0.
+
+See [LICENSE](https://github.com/oracle-devrel/technology-engineering/blob/main/LICENSE) for more details.