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公开(公告)号：US09983903B2
公开(公告)日：2018-05-29
申请号：US15088810
申请日：2016-04-01
Applicant: SAP SE
Inventor： Anastasia Ailamaki , Tobias Scheuer , Iraklis Psaroudakis , Norman May
CPC classification number: G06F9/466 , G06F9/4843 , G06F9/5038 , G06F9/505 , G06F9/5066 , G06F17/2705 , G06F17/30445 , G06F17/30463 , G06F2209/5017 , G06F2209/5018 , G06F2209/504 , Y02D10/22
Abstract: Systems and method for a task scheduler with dynamic adjustment of concurrency levels and task granularity are disclosed for improved execution of highly concurrent analytical and transactional systems. The task scheduler can avoid both over commitment and underutilization of computing resources by monitoring and controlling the number of active worker threads. The number of active worker threads can be adapted to avoid underutilization of computing resources by giving the OS control of additional worker threads processing blocked application tasks. The task scheduler can dynamically determine a number of parallel operations for a particular task based on the number of available threads. The number of available worker threads can be determined based on the average availability of worker threads in the recent history of the application. Based on the number of available worker threads, the partitionable operation can be partitioned into a number of sub operations and executed in parallel.
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公开(公告)号：US09740525B2
公开(公告)日：2017-08-22
申请号：US14945262
申请日：2015-11-18
Applicant: SAP SE
Inventor： Tobias Scheuer
IPC: G06F9/48
CPC classification number: G06F9/4881
Abstract: In a computing system having a multiple central processing unit (CPU) cores the task scheduler can be configured to generate one or more priority value lists of elements, with each priority value list comprising elements having the same priority value. The priority queue of a task scheduler can be populated by links to priority value lists that are arranged in order of priority. Worker threads can access an input SIAO and determine the maximum priority of any element in the input SIAO. If the input SIAO has an element with higher priority than the priority queue of the task scheduler then the worker thread can cause the task associated with that element to be processed, otherwise the worker thread can cause all of the elements of the SIAO to be put into the priority value lists linked to by the elements in the priority queue.
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公开(公告)号：US20240427630A1
公开(公告)日：2024-12-26
申请号：US18338623
申请日：2023-06-21
Applicant: SAP SE
Inventor： Mathias Gottschlag , Tobias Scheuer
Abstract: The present disclosure relates to computer-implemented methods, software, and systems for flexibly managing limits for execution of jobs in parallel threads provided by a system. A request for the execution of a first statement at one or more threads associated with parallel processing at the system is received. A first snapshot object of an initial hierarchy of workload classes is obtained. The first snapshot object includes pointers to limiters defined for the workload classes and statements within the initial hierarchy. Each limiter defines an allowable number of threads for parallel execution of jobs. A modification to the hierarchy of workload classes is performed during runtime of the one or more jobs. A second snapshot object of a modified hierarchy of the workload classes. The execution of one or more created jobs is completed based on complying with limits as aggregately calculated for the first statement.
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公开(公告)号：US11429388B2
公开(公告)日：2022-08-30
申请号：US16883241
申请日：2020-05-26
Applicant: SAP SE
Inventor： Dirk Thomsen , Thorsten Glebe , Tobias Scheuer , Werner Thesing , Johannes Gloeckle
Abstract: Aspects of the current subject matter are directed to an approach in which a parallel load operation of file ID mapping containers is accomplished at start and/or restart of a database system. Parallel load operation of file ID mapping and/or large binary object (LOB) file ID mapping is done among a plurality of scanning engines into a plurality of data buffers that are associated with each of the plurality of scanning engines. Each scanning engine operates on a certain path of a page chain of a page structure including the mapping, causing the page chain to be split among scanning engines to process maps. Contents of the data buffers are pushed to mapping engines via a queue. The mapping engines load the file ID mapping and the LOB file ID mapping into maps for in-system access.
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公开(公告)号：US10459760B2
公开(公告)日：2019-10-29
申请号：US15206186
申请日：2016-07-08
Applicant: SAP SE
Inventor： Tobias Scheuer
IPC: G06F9/48
Abstract: Scheduling jobs from an application based on a job concurrency hint. The job concurrency hint providing an indication of the number and/or size of the jobs that can be handled by the job scheduler. The scheduling of the jobs based on the job concurrency hint including selecting the number and/or size of the jobs to pass to the job scheduler for execution by a thread in a core of a processor.
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Patent Agency Ranking
公开(公告)号：US20170017674A1
公开(公告)日：2017-01-19
申请号：US14802580
申请日：2015-07-17
Applicant: SAP SE
Inventor： Tobias Scheuer , Iraklis Psaroudakis , Abdelkader Sellami , Norman May , Anastasia Ailamaki
IPC: G06F17/30
CPC classification number: G06F16/2282
Abstract: Techniques and solutions are provided for performing adaptive database table placement in a non-uniform memory access (NUMA) architecture. The adaptive table placement can occur in response to changing workloads on the NUMA nodes. For example, if a particular NUMA node is saturated, a database table may be moved from the memory of the saturated NUMA node to the memory of another NUMA node that is underutilized. In some cases, an entire database table is moved, while in other cases the database table is partitioned and only part of the table is moved.
Abstract translation: 提供了技术和解决方案，用于在非均匀存储器访问（NUMA）架构中执行自适应数据库表放置。 自适应表放置可以响应于NUMA节点上的工作负载变化而发生。 例如，如果特定的NUMA节点饱和，则数据库表可以从饱和NUMA节点的存储器移动到未充分利用的另一个NUMA节点的存储器。 在某些情况下，整个数据库表被移动，而在其他情况下，数据库表被分区，只有表的一部分被移动。
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公开(公告)号：US20210373893A1
公开(公告)日：2021-12-02
申请号：US16883241
申请日：2020-05-26
Applicant: SAP SE
Inventor： Dirk Thomsen , Thorsten Glebe , Tobias Scheuer , Werner Thesing , Johannes Gloeckle
Abstract: Aspects of the current subject matter are directed to an approach in which a parallel load operation of file ID mapping containers is accomplished at start and/or restart of a database system. Parallel load operation of file ID mapping and/or large binary object (LOB) file ID mapping is done among a plurality of scanning engines into a plurality of data buffers that are associated with each of the plurality of scanning engines. Each scanning engine operates on a certain path of a page chain of a page structure including the mapping, causing the page chain to be split among scanning engines to process maps. Contents of the data buffers are pushed to mapping engines via a queue. The mapping engines load the file ID mapping and the LOB file ID mapping into maps for in-system access.
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公开(公告)号：US11042527B2
公开(公告)日：2021-06-22
申请号：US15980525
申请日：2018-05-15
Applicant: SAP SE
Inventor： Tobias Scheuer , Dirk Thomsen
Abstract: Systems and methods are described herein for system critical phase lock job inhibitors. Acquisition of a consistent change exclusive lock is initiated. A job request having a scope object is received. Execution of the job request and generation of a replacement job associated with the job request is prohibited based on the scope object indicating that the job requires consistent change access during the consistent change exclusive lock.
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公开(公告)号：US20190340017A1
公开(公告)日：2019-11-07
申请号：US15970730
申请日：2018-05-03
Applicant: SAP SE
Inventor： Tobias Scheuer , Dirk Thomsen
Abstract: Systems and methods are described herein for job execution using system critical threads. An in-memory database system having pages loaded into a memory and having associated physical disk storage generates a safety critical thread pool. The safety critical thread pool has one or more safety critical threads associated with flushing the pages to the physical disk storage. Execution of the one or more safety critical threads is initiated within the safety critical thread pool. A job request to access data stored within the physical disk storage is received. Utilization levels of the one or more safety critical threads are monitored. Execution of the job request is permitted based on the utilization levels associated with the one or more safety critical threads.
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公开(公告)号：US20180011737A1
公开(公告)日：2018-01-11
申请号：US15206186
申请日：2016-07-08
Applicant: SAP SE
Inventor： Tobias Scheuer
CPC classification number: G06F9/4881
Abstract: Scheduling jobs from an application based on a job concurrency hint. The job concurrency hint providing an indication of the number and/or size of the jobs that can be handled by the job scheduler. The scheduling of the jobs based on the job concurrency hint including selecting the number and/or size of the jobs to pass to the job scheduler for execution by a thread in a core of a processor.
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