Also please read my comment about filesystem caches and innodb flush methods O_DIRECT, and ALL_O_DIRECT. you do not want OS buffercache to compete with DBMS caches, and you can save a lot of memory with it (especially with ALL_O_DIRECT)
Also please read my comment about filesystem caches and innodb flush methods O_DIRECT, and ALL_O_DIRECT. you do not want OS buffercache to compete with DBMS caches, and you can save a lot of memory with it (especially with ALL_O_DIRECT)