Abstract: In a virtual machine, Java Virtual Machine, or other runtime environment, a system and a method for improving the garbage collection times of the virtual machine memory. The JVM, or a garbage collector operating therein, can estimate, for an area of the memory space, the sum of the pause times for garbage collection of the software objects within the area, and control the garbage collection process so that the sum of the pause times for garbage collection will be lower than a target pause time limit, with a high degree of probability. A preselected compaction area can be pre-compacted to keep the compaction time within the target limit. The garbage collector can also predict the time required for final marking and repeat precleaning until the predicted final marking time is within the limits for pause times, and can improve pause times by redirecting application worker threads to do garbage collector work when entering or leaving the memory subsystem.

Abstract: A system for generational garbage collection in a virtual machine environment, comprising a virtual machine for executing a software application; a memory space for use by the virtual machine in storing software objects and pointers as part of the software application, divided into a three space nursery and an old space heap; a nursery garbage collector that can collect two out of the three spaces to reduce the promotion rate; and an old space garbage collector.

Abstract: In a virtual machine, Java Virtual Machine, or other runtime environment, a system and a method for improving the garbage collection times of the virtual machine memory. The JVM, or a garbage collector operating therein, can estimate, for an area of the memory space, the sum of the pause times for garbage collection of the software objects within the area, and control the garbage collection process so that the sum of the pause times for garbage collection will be lower than a target pause time limit, with a high degree of probability. A preselected compaction area can be pre-compacted to keep the compaction time within the target limit. The garbage collector can also predict the time required for final marking and repeat precleaning until the predicted final marking time is within the limits for pause times, and can improve pause times by redirecting application worker threads to do garbage collector work when entering or leaving the memory subsystem.

Abstract: In a virtual machine, Java Virtual Machine, or other runtime environment, a system and a method for improving the garbage collection times of the virtual machine memory. The JVM, or a garbage collector operating therein, can estimate, for an area of the memory space, the sum of the pause times for garbage collection of the software objects within the area, and control the garbage collection process so that the sum of the pause times for garbage collection will be lower than a target pause time limit, with a high degree of probability. A preselected compaction area can be pre-compacted to keep the compaction time within the target limit. The garbage collector can also predict the time required for final marking and repeat precleaning until the predicted final marking time is within the limits for pause times, and can improve pause times by redirecting application worker threads to do garbage collector work when entering or leaving the memory subsystem.

Abstract: A system for generational garbage collection in a virtual machine environment, comprising a virtual machine for executing a software application; a memory space for use by the virtual machine in storing software objects and pointers as part of the software application, divided into a three space nursery and an old space heap; a nursery garbage collector that can collect two out of the three spaces to reduce the promotion rate; and an old space garbage collector.

Abstract: In a virtual machine, Java Virtual Machine, or other runtime environment, a system and a method for improving the garbage collection times of the virtual machine memory. The JVM, or a garbage collector operating therein, can estimate, for an area of the memory space, the sum of the pause times for garbage collection of the software objects within the area, and control the garbage collection process so that the sum of the pause times for garbage collection will be lower than a target pause time limit, with a high degree of probability. A preselected compaction area can be pre-compacted to keep the compaction time within the target limit. The garbage collector can also predict the time required for final marking and repeat precleaning until the predicted final marking time is within the limits for pause times, and can improve pause times by redirecting application worker threads to do garbage collector work when entering or leaving the memory subsystem.