#include <db.h> int DBcursor->set_priority(DBC *DbCursor, DB_CACHE_PRIORITY priority);
Set the cache priority for pages referenced by the DBcursor handle.
The priority of a page biases the replacement algorithm to be more or
less likely to discard a page when space is needed in the buffer pool.
The bias is temporary, and pages will eventually be discarded if they
are not referenced again. The DBcursor->set_priority() method is
only advisory, and does not guarantee pages will be treated in a
specific way.
The DBcursor->set_priority() method may be called at any time during
the life of the application.
The DBcursor->set_priority()
method returns a non-zero error value on failure and 0 on success.
The priority parameter must be set to one of the following values:
The lowest priority: pages are the most likely to be discarded.
The next lowest priority.
The default priority.
The next highest priority.
The highest priority: pages are the least likely to be discarded.