maxpgio

Description

Maximum number of page I/O requests that can be queued by the paging system. This number is divided by 4 to get the actual maximum used by the paging system. It is used to throttle the number of requests as well as to control process swapping.

Data Type

Signed integer

Default

40

Range

1 to 1024

Units

I/0s

Dynamic?

No

Validation

None

Implicit

The maximum number of I/O requests from the pager is limited by the size of a list of request buffers, which is currently sized at 256.

When to Change

When the system is subject to bursts of severe memory pressure. A larger value here helps to recover faster from the pressure if more than one swap device is configured or the swap device is a striped device.

Commitment Level

Unstable