Free Page List
The free page list is the part of secondary page cache that contains pages allocated to the process that have not been modified.
An average free-page list size that is between the values of the FREELIM and FREEGOAL system parameters usually indicates deficient memory and is often accompanied by a high page fault rate. If either condition exists, or if the hard fault rate exceeds the recommended percentage, you must consider enlarging the free- and modified-page lists, if possible. Enlarging the secondary page cache could reduce hard faulting, provided such faulting is not the result of image activation.
The easiest way to increase the free page cache is to increase the value of FREEGOAL. Active reclamation will then attempt to recover more memory from idle processes. Typically, overall fault rates decrease when active reclamation is enabled because memory is more readily available to active processes.