What is DISTRIBUTED_LOCK_TIMEOUT in Oracle?
DISTRIBUTED_LOCK_TIMEOUT specifies the amount of time (in seconds) for distributed transactions to wait for locked resources. See Also: Oracle Database Concepts and Oracle Database Administrator’s Guide for more information on data concurrency.
What is dba_2pc_pending?
The dba_2pc_pending view contains an ADVISE column that directs the database to either commit or roll back the pending item.
What is distributed transaction in Oracle?
A distributed transaction includes one or more statements that, individually or as a group, update data on two or more distinct nodes of a distributed database.
How do you fix Ora 02049 timeout distributed transaction waiting for lock?
To resolve ORA-02049, you would need to increase the SHARED_POOL_SIZE value in init. ora . If you find that the shared pool is large enough and the ORA-02049 error continues to exist, you may also want to try flushing the shared pool with ALTER SYSTEM FLUSH SHARED_POOL; to free even more space.
What is DBA_2PC_NEIGHBORS?
DBA_2PC_NEIGHBORS :Lists all incoming and outgoing in-doubt distributed transactions. It also indicates whether the local node is the commit point site in the transaction. LOCAL_TRAN_ID: Local transaction identifier. IN_OUT: IN for incoming transactions; OUT for outgoing transactions.
What is the difference between a local transaction and a distributed transaction?
What is the difference between a Local Transaction and a Distributed Transaction? a. Local transactions are performed on a single database table, but distributed transactions are performed on more than one database tables.
What is global transaction in DBMS?
A global transaction is a mechanism that allows a set of programming tasks, potentially using more than one resource manager and potentially executing on multiple servers, to be treated as one logical unit.
How do you handle distributed transactions?
How the Saga pattern helps in a distributed transaction scenario
- Maintain data consistency across multiple microservices without tight coupling.
- Perform better compared to 2PC.
- Offer no single point of failure.
- Keep the overall state of the transaction eventually consistent.
What is 2PC in database?
A two-phase commit is a standardized protocol that ensures that a database commit is implementing in the situation where a commit operation must be broken into two separate parts. In database management, saving data changes is known as a commit and undoing changes is known as a rollback.