因为每一个系统都有自己单独的硬件，所以每一个程序可用的进程数量是固定的。
Because each system has its own separate hardware, the amount of processing power that is available to each application is fixed.
确保事务管理器总体上保持可用，即使进程检测到了故障，也只有执行事务的那个进程受到影响。
Make sure that the transaction manager overall remains available, even after the process detects the failure, Only the process executing the transaction should be affected.
这为VPS提供了一定层次上的控制，定义了有多少内存可用，有多少进程间通信(IPC)对象可用等。
This provides a level of control over a VPS, defining how much memory is available, how many interprocess communication (IPC) objects are available, and so on.
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