When Oracle detects a deadlock, the current SQL in the session detecting the deadlock is cancelled and 'statement-level rollback' is performed so as to free up resources and not block all activity. The session that detected the deadlock is still 'alive' and the rest of the transaction is...
Another way to serialize transactions is to create an auxiliary“semaphore”table that contains just a single row. Have each transaction update that row before accessing other tables. In that way, all transactions happen in a serial fashion. Note that theInnoDBinstant deadlock detection algorithm al...
In general, only application designers using the programming interfaces to Oracle are concerned with which types of actions should be grouped together as one transaction. Transactions must be defined properly so that work is accomplished in logical units and data is kept consistent. A transaction ...
There are two ways that an application can receive a signal: from an external source or from an internal source. In this case, we are going to set a timer to send a signal to the application after one second. The functionsetitimer()takes the signal to be sent, a value for the time...
Active Directory problem: Check if a user exists in C#? Active Directory User does not assign User logon name and User Principal Name AD LDS cannot ChangePassword, but it can SetPassword Add <?xml version="1.0" encoding="UTF-8" standalone="yes"?> to my xml response Add a Constraint ...
Concurrent Insert in multi treaded environment to the same table concurrent inserts into the same table configure a timeout value for an inactive database connection Connect reset by SqlServer Connect to Oracle, error 7302 Connecting to SQL Server without instance name Connection closed from applicati...
monitor thread that will periodically check for deadlock situations, choose one of the processes implied as a victim for termination. While this is a good point for one of the sessions, this is not for the other. The “victim” is actually terminated with an error and has to be run ...
Don’t forget to check that there is enough space on event file target partition or disk. Setting values to variable components once for all We are about to create an automatic data collection and split of data related to deadlock. The stored procedures presented above have variable in...
There are many possible ways to do this - user code can be waiting for a lock that never gets released, either because it was leaked or there was a logical deadlock or livelock, or it could be in a clever infinite loop, etc. Once again, any unsent response will never happen...
It is often useful to dump the internal contents of Oracle internal structures such as the control files, library cache, and redo log headers. The following undocumented Oracle commands can be used for this purpose.For each of these commands, a trace file will be generated in your UDUMP direc...