若干个用户空间后台进程。
在这两者之中，实例都是指后台进程与共享内存的组合。
In both cases an instance is a combination of background processes and Shared memory.
例如，同一台计算机上的三个实例就需要三组后台进程。
For example, three instances in one machine will require three set of background processes.
最激动人心的莫过于“webworker”后台进程。
所有安装了DB2的机器都具有一个称作DAS的后台进程。
Any machine with DB2 installed with have one background process known as the DAS.
如果异常终止一个Oracle后台进程，那么常常需要重启实例。
If an Oracle background process is aborted, often a restart of the instance is required.
通过ps命令确认LoadLeveler后台进程正在在主节点上运行。
Use the ps command to make sure LoadLeveler daemons are running on the primary node.
因此，后台任务1即为进程ID 16843。
bgnice：在后台以更低的优先级运行所有进程。
Bgnice: Run all processes in the background at a lower priority.
起初，sleep命令在后台启动，其进程ID为19988。
Initially, the sleep command started in the background with process ID 19988.
每个守护进程都在后台运行。
Each daemon is being started to run in the background (as a daemon).
当一个程序出错的时候，有很多进程是要在系统后台运行的（为了处理这个错误）。
There are many things that go on "under the hood" when program errors occur.
后台检查点进程已挂起，直到有可用的锁。
Background checkpoint process suspended until locks are available.
虚拟磁盘正在进行后台初始化进程。
The virtual disk is undergoing a background initialization process.
虚拟磁盘正在进行后台初始化进程。
The virtual disk is undergoing a background initialization process.
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