SQL Server 2012 Query Performance Tuning

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Use this fast and complete guide to optimize the performance of MongoDB databases and the applications that depend on them. You will be able to turbo-charge the performance of your MongoDB applications to provide a better experience for your users, reduce your running costs, and avoid application growing pains. MongoDB is the world's most popular document database and the foundation for thousands of mission-critical applications. This book helps you get the best possible performance from MongoDB.MongoDB Performance Tuning takes a methodical and comprehensive approach to performance tuning that begins with application and schema design and goes on to cover optimization of code at all levels of an application. The book also explains how to configure MongoDB hardware and cluster configuration for optimal performance. The systematic approach in the book helps you treat the true causes performance issues and get the best return on your tuning investment. Even when you're under pressure and

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SQL tuning improvements existing execution plans. The authors discuss the removal of brakes in the execution plan. Such "brakes" or bottlenecks can be recognized by a formal analysis of the execution

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【書籍特點】☆Transformer：自注意力、多頭注意力、位置編碼☆GPT：文字生成、Greedy Search、Beam Search、困惑度評估☆BERT：遮罩語言模型、預訓練、微調、分類任務☆ViT：影像分塊、視覺嵌入、注意力量化☆微調方法：Adapter Tuning、LoRA、P-Tuning☆資料處理：文字清洗、分詞、嵌入向量、資料增強☆混合精度與分散式訓練：Data Parallel、Model Parallel、梯度累積☆對比學習與對抗訓練：SimCLR、GAN、自監督任務☆最佳化器：AdamW、LAMB、動態學習率、Warmup、餘弦退火☆模型壓縮：知識蒸餾、教師學生架構、權重剪枝☆訓練流程：Tokenization、多GPU訓練、訓練中斷與恢復☆微調實作：資料集切分、層級凍結、超參數調整、推理量化【內容簡介】本書共分為12章，涵蓋大模型的建構、訓練與微調流程。第一章介紹Transformer的基本原理，包括自注意力、多頭注意力與位置編碼。第二章說明GPT模型的文字生成機制與實作方法，並比較Greedy與Beam Search等生成策略。第三章講解BERT模型的編碼結構與遮罩語言模型任務，並說明如何應用於分類任務。第四章介紹ViT模型在影像分塊、嵌入與注意力運算上的應用。第五章說明Adapter Tuning、LoRA、P-Tuning等常見微調方法。第六章說明資料清洗、資料增強與嵌入向量生成等處理技術。第七章解釋混合精度訓練、多GPU併行與梯度累積等效率優化技術。第八章涵蓋對比學習與對抗訓練，包括SimCLR與GAN的實作細節。第九章介紹AdamW與LAMB最佳化器，並比較各種動態學習率排程方式。第十章說明知識蒸餾與剪枝，包括教師學生架構與多頭注意力精簡方法。第十一章示範大模型訓練流程，從資料前處理到訓練中斷與恢復。第十二章介紹模型微調的實作，包括資料集切分、參數設定與推理效能調整。

《2012-2013世界商務發展動態》是“世界商務發展動態研究”第三期成果的結集，沿襲“研究國外、結合國內、針對上海”的原則，同時保持研究內容的延續性，主要包括重點商務領域的動態研究和熱點問題的專題研究。