DTrace support for execution monitoring. See Section 6, “Diagnostic and Monitoring Capabilities”.

Atomic instructions, which are needed for the improvements to RW-locking and the lock-free thread concurrency algorithm described in Section 3, “Scalability Improvements”. Atomic instructions now are supported for Sun Studio on SPARC and x86 platforms. This extends their previous availability (supported for gcc 4.1 and up on all platforms).

The Google SMP patch described in Section 3, “Scalability Improvements”, was originally intended for x86 platforms. In MySQL 5.4 it also works on SPARC platforms. Also, Solaris optimizations for the patch have been implemented.

Large page support is enhanced for recent SPARC platforms. Standard use of large pages in MySQL attempts to use the largest size supported, up to 4MB. Under Solaris, a “super large pages” feature enables uses of pages up to 256MB. This feature is enabled by default on Solaris. It can be enabled or disabled explicitly by using the --super-large-pages or --skip-super-large-pages option.

Inline handling for InnoDB and processor instruction prefetching support, previously not enabled for builds created using Sun Studio, now are supported for that build environment.