Oracle Linux offers users two additional new features that Wim Coekaerts neglected to include in an earlier post, so he brings them to light in the current post. These are Oracle Database Smart Flash Cache (DBSFC) and assigning a conrol group (cgroup) in Oracle Linux to an Oracle database instance. DBSFC allows users to extend the Oracle Buffer Cache in memory (SGA) using secondary flash based storage, Coekaerts writes, that can be presented to the database through a file on a filesystem on flash storage, a raw disk device (flash-based) or through adding flash storage to Oracle ASM and creating a region inside ASM. The cgroup feature lets users create resource groupings based on cpu, memory or disk parameters (or a combination), according to Coekaerts. cgroups is also the internal set of features that Linux containers (lxc) uses. Basically you put processes (pids/tasks) into a cgroup and then they live within the limits of that cgroup definition. With lxc you basically also get process isolation on top, he reports.

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