Computer program product for overflow queue processing

A computer program product comprising a computer useable medium having computer program logic recorded thereon for enabling a processor in a computer system to manage a plurality of data structures stored in a computer storage medium, the computer storage medium comprising a primary storage medium and an overflow storage medium, the computer program logic comprising:

• receiving means for enabling the processor to receive a request to store a data object in a target data structure;
• overflow determining means for enabling the processor to determine whether an overflow mode condition currently exists;
• threshold determining means, responsive to a determination that an overflow mode condition does not currently exist, for enabling the processor to determine whether a combined size of all data structures stored in the primary storage medium plus a size of the data object is greater than a predetermined threshold;
• overflow mode means, responsive to a determination that a combined size of all data structures stored in the primary storage medium plus a size of the data object is greater than a predetermined threshold, for enabling the processor to enter an overflow mode such that an overflow mode condition exists;
• data structure selecting means, responsive to said overflow mode means, for enabling the processor to select one or more data structures currently stored in the primary storage medium;
• and
• data structure moving means, responsive to said data structure selecting means, for enabling the processor to move said selected data structures from the primary storage medium to the overflow storage medium.