段3-预留给实例共享内存。
这意味着实例共享内存可能会很大。
That means the instance Shared memory can potentially be very large.
实例共享内存的结束地址是不固定的。
The end address of the instance Shared memory segment is not fixed.
段3 （蓝色）被分配给实例共享内存。
每个DB 2实例都有一个实例共享内存。
紧接着实例共享内存的是数据库共享内存。
Following the instance Shared memory is the database Shared memory.
本文将介绍实例共享内存和数据库共享内存。
This article explains instance Shared memory and database Shared memory.
平台实例共享内存数据库共享内存代理私有内存。
Platform Instance Shared Memory Database Shared Memory Agent Private Memory.
这样的逻辑同样适用于实例共享内存和应用程序组共享内存。
Same logic applies to the instance Shared memory and the application group Shared memory.
实例共享内存和数据库共享内存合起来大约是3.7GB。
The instance Shared memory and database Shared memory combined is around 3.7gb.
实例共享内存，即绿色那部分，始于默认地址0x10000000。
The instance Shared memory, in green, starts at the default address 0x10000000.
instance_memory参数只是设置了实例共享内存的限制。
The instance_memory parameter only sets the limit for the instance Shared memory.
在默认情况下，实例共享内存的起始地址固定于0x10000000。
By default, the starting address of the instance Shared memory is fixed at 0x10000000.
所有3个绿色的段被用于共享内存，包括实例共享内存和数据库共享内存。
All three green segments are used for Shared memory, which includes both instance Shared memory and database Shared memory.
pmap输出并没有说出哪一个段是实例共享内存，哪一个段是数据库共享内存。
The pmap output does not tell you which segment is the instance Shared memory and which is the database Shared memory.
因为实例共享内存的结束地址不固定，所以数据库共享内存的起始地址也是不固定的。
Since the end address of the instance Shared memory is not fixed, the starting address for the database Shared memory is not fixed either.
如果设置了DB2DBMSADDR注册表变量，那么实例共享内存将从该变量指定的地址开始。
If the DB2DBMSADDR register variable is set, then the instance Shared memory will start at the address specified by this variable.
从0x10000000到0x3fffffff的段是实例共享内存，总共是0.75GB。
The segment starting from 0x10000000 to 0x3fffffff is the instance Shared memory, for a total of 0.75gb.
注意这个数量同时还包括实例共享内存和数据库共享内存，并且它们的内存段必须是邻接的。
Note this amount includes both the instance Shared memory and database Shared memory, and their memory segments must be contiguous.
由于这些内存段的大小不是固定的，我们只能估计实例共享内存和数据库共享内存的大小为。
Since the sizes of all these memory segments are not fixed, we can only estimate the size of the instance and database Shared memory to be.
至此，我们已经讨论了实例共享内存、数据库共享内存和应用程序组共享内存以及代理私有内存。
So far we have discussed the instance Shared memory, the database Shared memory, the application group Shared memory and the agent private memory.
每当某个堆超出了其配置的大小时，便可以使用溢出缓冲区来满足实例共享内存区内任何堆的峰值需求。
The overflow buffer is used to satisfy peak memory requirements for any heap in the instance Shared memory region whenever a heap exceeds its configured size.
注意，实例共享内存现在从0x12000000 开始，而不是从默认地址 0x10000000 开始。
Note that the instance shared memory now starts at 0x12000000 instead of the default address 0x10000000.
下面的输出表明有 42MB 的内存被预留给实例共享内存集（10313页 * 4096字节/页）
The following output indicates 42 MB of memory is reserved for the instance shared memory set (10313 pages * 4096 bytes per page)
实例共享内存是在数据库管理器启动(db2start)时分配的，并随着数据库管理器的停止(db2stop)而释放。
Instance Shared memory is allocated when the database manager is started (db2start), and freed when the database manager is stopped (db2stop).
上面的例子表明，虽然预留给实例共享内存集的内存有42MB，但在db2mtrk运行时只用到了大约21 MB。
The above example showed that although 42 MB is memory is reserved for the instance Shared memory set, only about 21 MB is being used at the time db2mtrk is run.
我们可以通过设置DB2DBMSADDRDB 2注册表变量，将实例共享内存移到更高的地址，从而增加代理私有内存。
The agent private memory can be increased by moving the instance Shared memory to a higher address by setting the DB2DBMSADDR DB2 registry variable.
于是，每个实例的可用共享内存就变为1gb加上象限4中仍然可用的空间。
The Shared memory available per instance, then becomes, 1gb plus whatever space is still available in quadrant 4.
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.
如果为每个实例都创建一个数据库，那么就可以为一个数据库分配最多1GB的空间作为共享内存。
If one database is created per instance, it is possible to allocate up to 1gb for Shared memory usage for that database.
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