What I am trying to establish is whether there is any direct relation between Isolation Levels and Locks. So, let's say I started a transaction with a Serializable isolation level then will Oracle ...

I am reading a manual about innodb transactions but still, there is lots of unclear stuff to me. For instance, I don't quite understand to the following behaviour: -- client 1 -- client 2 mysql&gt...

TL;DR: we have long-running imports which seem to hold locks on the parent partitioned table even though nothing is directly referencing the parent table. Background In our system, we have inventor...

I've ran into a need to figure this out on 9.6, but information on anything 9.6 or later would be appreciated. I'm having an issue with my application being blocked on a database call because it's...

How can I guarantee that I can search if a username exists in my database, then insert that username into the database as a new row without any intercept between the SELECT and INSERT statements? ...

I am trying to develop a booking system, that books different assets after checking its availability. The system first tries to read records from the DB and checks if the slot being booked is avail...

I have a Django app saving objects to the database and a celery task that periodically does some processing on some of those objects. The problem is that the user can delete an object after it has ...

I am doing a project in wicket How to solve the problem. I came across such a message: WicketMessage: Can't instantiate page using constructor public itucs.blg361.g03.HomePage() Root cause: java....

I tried to find on google but no success. Can anybody explain at what level elastic search take locks to handle multiple threaded or multi process environment? Whether it is at index or doctype o...

When i try to insert/update something in a db table, will Oracle lock the whole table or only the row being inserted/updated? Is this something that can be controlled through external configuratio...

What is the difference between an explicit and an implicit lock in database?

I've thoroughly read MSDN about table hints and I don't seem to find the locking granularity default. Suppose I have the following query: SELECT TOP (1) * FROM MyTable WITH (UPDLOCK, READPAST) ORD...

In SQL Server 2008 I have a view V over tables A and B that looks roughly like create view V as select * from A union all select * from B Reading from V causes a query to take intent shared l...