Large page optimization
Large page optimization is a feature of IBM® AIX Dynamic System Optimizer that automatically changes the page size to a larger 16 MB page size when it predicts improved performance.
Large page optimization transparently upgrades 4 KB and 64 KB page sizes of System V shared
memory and 64 KB page size of process text to 16 MB page size. This larger page size can benefit
workloads that use large chunks of data because it reduces the number of errors caused by the
translation lookaside buffer (TLB). When this optimization is installed, is activated, and
determines that there might be a benefit, ASO automatically promotes heavily used regions of memory
to 16 MB pages. This optimization potentially improves the performance of workloads that use those
regions because it reduces the number of TLB misses.
Note: Only System V shared memory and process
text is eligible for large page optimization.