When the amount of available free memory dips too far below 100 MB (25,000 pages),
some sites have experienced issues. 40 MB of free memory is the lowest acceptable
amount. You can usually avoid problems if you configure your AMPs to have at least
135 MB of OS-managed memory per AMP. You can adjust the amount of available free memory
by performing the following:
Use ctl to adjust the FSG Cache percent downward to make more memory available to
free memory. If the system takes too much memory for FSG Cache and the OS does not
use that memory, the free memory is wasted.
If available free memory goes below 100 MB during heavy periods of redistribution
(as explained later in this section), lower the value of the RedistBufSize field in
the DBS Control Record (see “RedistBufSize” in Utilities).