locking

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selecting from same table with multiple sessions [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Force Oracle to return TOP N rows with SKIP LOCKED[详细]

2023-04-13 06:18 分类：问答
boost::scoped_lock not working with local static variable?

I made the following sample program to play with boost threading: #pragma once #include \"boost\\thread\\mutex.hpp\"[详细]

2023-04-13 05:35 分类：问答
Whats the Best Concurrent Thread Shared Memory Architecture Without Locking?

I have a 2d Array of memory. I have multiple threads reading and writing to single elements in the array spontaneously, arbitrarily, and concurrently.[详细]

2023-04-12 21:16 分类：问答
Delay notification for lock acquisition in Java

We have a use case where we need to acquire a lock and send a notification if acquiring the lock takes more than 5 mins. We should still be waiting for the lock forever.[详细]

2023-04-12 19:04 分类：问答
Should NSLocking usage always be wrapped in @try/@finally?

Given a Cocoa NSLocking object (like an N开发者_如何学运维SLock) and some non-trivial code to be executed while the lock is held:[详细]

2023-04-12 04:48 分类：问答
How to detect, if any other entity/process is writing a file, in Linux?

Please note that, I don\'t have any control over the target file. Some other process is writing that file. I just want to copy the file when other process completes the write operation.[详细]

2023-04-12 04:38 分类：问答
Avoid locks in Oracle UPDATE command

If I am trying to acquire a lock in Oracle 10g (e.g. with SELECT...FOR UPDATE), there is a NOWAIT option to get an error when the row is locked, instead of the query just hanging. Is there a way to ac[详细]

2023-04-12 00:43 分类：问答
How to unlock boost::upgrade_to_unique_lock (made from boost::shared_mutex)?

So I had some shared_mutex and done this: boost::upgrade_lock<boost::shared_mutex> lock(f->mutex);开发者_C百科[详细]

2023-04-11 23:59 分类：问答
Java Hibernate + Oracle 11.2 Locking

I need to synchronize my user table with repository(the other DB) during application startup. I have two Tomcat nodes with Apache mod_jk. So when I restart both of them I make double inserts and doubl[详细]

2023-04-11 19:39 分类：问答
Locking sqlite3 db for file download

I have a sqlite3 database on some system which I need to d开发者_StackOverflow中文版ownload during ongoing operation. Stopping or pausing the accessing processes is not an option. So as far as I under[详细]

2023-04-11 04:45 分类：问答