per-thread 局部epoch counter。 在thread 在访问buffer-managed data structure前,会将local epoch = global epoch. thread在结束访问buffer-managed data structure时,将local epoch = ∞。 在cooling stage的page会有unswizzling时的global epoch。 当page的epoch < 所有线程中最小的local epoch时,page才能被evicted...
Fig. 2 Tree structure 内存中 B+ Tree 的 Page 都由 Buffer Manager 管理,访问 B+ Tree 的内存 Page 需要通过 Page ID 从 Buffer Manager 那获取对应的内存指针。通常 Buffer Manager 使用 Hash Table 来存储 Page ID 到内存指针的映射,方便快速知道一个 Page 在不在内存中以及对应的内存在哪。而为了支持...
virtual machines/ efficient data structurehigh-performance dynamic memory managementdynamic memory allocation algorithmsdynamic memory deallocation algorithmsfirst fitcommon listallocated listAdvances in software engineering, such as graphical user interface and object-oriented programming, have caused applications ...
In-Memory Data Management(节选) 热度: StructureofProcesses Chapter6 ProcessStateandTransition DataStructureforProcess LayoutofSystemMemory THEDESIGNOFTHEUNIXOPERATINGSYSTEM MauriceJ.bachPrenticeHall ProcessStatesandTransitions DataStructuresforProcess DataStructureforProcess(contd.) ...
MEMORY_MANAGEMENT 参数 参数1 标识完全冲突。 参数1错误消息的原因 0x31映像重新定位修复表或代码流已损坏。 该错误可能是一个硬件错误。 0x3f由于循环冗余校验 (CRC) 错误,一个页内操作失败。 参数 2 包含页面文件偏移量。 参数 3 包含页 CRC 值。 参数 4 包含预期的 CRC 值。
25.4.3.13 Data Node Memory Management All memory allocation for a data node is performed when the node is started. This ensures that the data node can run in a stable manner without using swap memory, so that NDB can be used for latency-sensitive (realtime) applications. The following ...
Memory management is the heart of operating systems; it is crucial for both programming and system administration. While the concepts are generic, examples are mostly from Linux and Windows on 32-bit x86. Each process in a multi-tasking OS runs in its own memory sandbox(wiki link). This san...
LIFO is a fundamental concept in data structures. It's exemplified by the stack, a dynamic structure where the last element added is the first one to be removed. This arrangement simplifies data management, especially in scenarios requiring quick access to the most recent information. In programmi...
25.4.3.13 Data Node Memory Management All memory allocation for a data node is performed when the node is started. This ensures that the data node can run in a stable manner without using swap memory, so thatNDBcan be used for latency-sensitive (realtime) applications. The following types ...
However, such concurrency is achievable only if the MMU has its own local memory that holds the necessary data structure information. Specifically, the MMU needs to maintain pointers to memory buffers, link information for the packets and the queues, etc. When the MMU performs memory management ...