Abstract: System, method, computer program product embodiments and combinations and sub-combinations thereof for managing data storage as an in-memory database in a database management system (DBMS) are provided. In an embodiment, a specialized database type is provided as a parameter of a native DBMS command. A database hosted entirely in-memory of the DBMS is formed when the specialized database type is specified.

Abstract: Reducing contentions between processes or tasks that are trying to access shared resources is described herein. According to embodiments of the invention, a method of writing a set of data associated with a task to a memory resource is provided. The method includes calculating the amount of memory required to write said data to the memory resource and updating an expected end marker to reflect the amount of memory required to write the data to the memory resource. A flag is then set to an incomplete state, and the data is written to the memory resource. The flag can be set to a complete state and an end marker is updated. The end marker indicates the end of the data stored in the memory resource.

Abstract: Reducing contentions between processes or tasks that are trying to access shared resources is described herein. According to embodiments of the invention, a method of writing a set of data associated with a task to a memory resource is provided. The method includes calculating the amount of memory required to write said data to the memory resource and updating an expected end marker to reflect the amount of memory required to write the data to the memory resource. A flag is then set to an incomplete state, and the data is written to the memory resource. The flag can be set to a complete state and an end marker is updated. The end marker indicates the end of the data stored in the memory resource.

Abstract: System, method, computer program product embodiments and combinations and sub-combinations thereof for managing data storage as an in-memory database in a database management system (DBMS) are provided. In an embodiment, a specialized database type is provided as a parameter of a native DBMS command. A database hosted entirely in-memory of the DBMS is formed when the specialized database type is specified.

Abstract: A partial-blocking consistency point system identifies transaction updates with a consistency point ID associated with a consistency point sequence number, records consistency point data that identify a location of the partial-blocking consistency point, flushes to a non-volatile storage the transaction updates identified with the consistency point sequence number without blocking transaction activity, and hardens to the non-volatile storage the recorded partial-blocking consistency point so that data associated with the recorded partial-blocking consistency point can be recovered. The consistency point sequence number is incremented each time the partial-blocking consistency point is recorded to uniquely identify the partial-blocking consistency point and transaction updates associated with the partial-blocking consistency point. The transaction updates identified with the consistency point sequence number are processed to improve efficiency of the flushing of the transaction updates.

Abstract: A method and system in accordance with the present invention comprises a thread stack/thread heap combination, wherein the thread heap is for thread local memory usage and wherein the thread stack and thread heap grow in opposite directions. In the present invention the thread specific heap is allocated next to the thread's stack and grows in the opposite direction from that of the stack. This improvement allows the current space management of thread stacks, which spread out the memory placement of multiple stacks to avoid collision, to also be used for the heaps without additional overhead or complexity. It also allows the existing growth scheme of adding memory pages to the process for the stack to be used again because the growth is simply in the opposite direction. Thread specific heaps eliminate the need for expensive synchronization when allocating from a shared heap in a multiprocessor environment.

Abstract: A partial-blocking consistency point system identifies transaction updates with a consistency point ID associated with a consistency point sequence number, records consistency point data that identify a location of the partial-blocking consistency point, flushes to a non-volatile storage the transaction updates identified with the consistency point sequence number without blocking transaction activity, and hardens to the non-volatile storage the recorded partial-blocking consistency point so that data associated with the recorded partial-blocking consistency point can be recovered. The consistency point sequence number is incremented each time the partial-blocking consistency point is recorded to uniquely identify the partial-blocking consistency point and transaction updates associated with the partial-blocking consistency point. The transaction updates identified with the consistency point sequence number are processed to improve efficiency of the flushing of the transaction updates.