Semephores

Checking Semephores in Linux   Semaphores and Oracle 11g Semaphores are data structures within the operating system that function like signals for memory process communications. For Oracle, semaphores tell the Oracle processes when to stop, wait or start operations. In addition, semaphores tell Oracle processes when they are to resume processing. Each Oracle process has […]

Memory and 11gr2 and Linux

For large SGA sizes, HugePages can give substantial benefits in virtual memory management. Without HugePages, the memory of the SGA is divided into 4K pages, which have to be managed by the Linux kernel. Using HugePages, the page size can be increased to any value between 2MB and 256MB, thereby reducing the total number of […]