Adjusting the shared memory configuration to improve performance using the HMC

You can use the Hardware Management Console (HMC) to adjust the configuration of your shared memory environment to improve its performance. For example, you can change the I/O entitled memory or the memory weight that is assigned to a logical partition that uses shared memory (hereafter referred to as a shared memory partition.)

The following table lists several ways that you can adjust the configuration of your shared memory environment to improve its performance.

Table 1. Performance adjustments for shared memory configurations
Performance improvement task	Instructions
Set the memory weight for each shared memory partition so that the shared memory partitions with the most critical memory requirements receive more physical memory from the shared memory pool.	Changing the memory weight of a shared memory partition
Change the I/O entitled memory that is assigned to each shared memory partition to improve the throughput of I/O operations.	Adding and removing I/O entitled memory dynamically to and from a shared memory partition Determining the I/O entitled memory for a shared memory partition
Add or remove physical memory to and from the shared memory pool, which can increase or decrease the degree to which the shared memory configuration is overcommitted.	Changing the size of the shared memory pool
Dynamically change the amount of logical memory that each shared memory partition uses, which can increase or decrease the degree to which the memory configuration of the shared memory partition is overcommitted.	Adding and removing logical memory dynamically to and from a shared memory partition
Change a shared memory partition to a dedicated memory partition.	Changing the memory mode of a logical partition