September 2001
Intermediate to advanced
384 pages
11h 59m
English
Content preview from COM & .NET Component ServicesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Transaction Execution Time
Transaction execution time should be minimal. The reason is obvious: a transaction occupies expensive resources. As long as the transaction executes, no other transaction can access those resources. Every resource manager the transaction accesses has to lock relevant data, isolating that transaction from the rest of the world. As long as the locks are held, nobody else can access the data. The more transactions per second your application can process, the better its scalability and throughput.
Transaction execution usually requires, at most, a few seconds. For lengthy operations, consider using a short transaction backed up by a compensating transaction.
COM+ allows you to configure a maximum execution time for your transactions. If your transaction reaches that timeout, COM+ aborts it automatically. Transaction timeouts prevent resource manager deadlocks from hanging the system. Eventually, one of the two transactions deadlocking each other would reach the timeout and abort, allowing the other transaction to proceed.
You can configure two kinds of transaction timeouts. The first is a
machine-wide parameter called the global transaction
timeout
. The global timeout applies to all
transactions on that machine. You configure the global timeout by
right-clicking on the My Computer icon in the Component Services
Explorer, selecting Properties from the context menu, and selecting
the Options tab (see Figure 4-13). The default timeout is set to 60 seconds, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.