Troubleshooting SQL Serer Latch and Latch timeout

Troubleshooting SQL Serer latches and latch timeouts from: https://mssqlwiki.com/2012/09/07/latch-timeout-and-sql-server-latch/ in a multithreaded

2022-06-01 Database 我要分享

Series of articles on TiKV Source Code parsing (11) Storage-transaction Control

Background knowledge TiKV is a strongly consistent distributed KV storage that supports transactions. TiKV uses raft to ensure strong consistency among multiple replicas. The transaction TiKV refers to Google's Percolator transaction model and implements the

2022-06-01 Database 我要分享

Optimization idea of latch:cache buffers chains

Data blocks are stored in buffer cache as linked list. When a session wants to access / modify the block of a buffer cache, it first needs to check whether the block exists in the bu through the hash algorithm

2022-06-01 Database 我要分享

How to understand Oracle Buffer

This article mainly introduces "how to understand Oracle Buffer". In daily operation, I believe many people have doubts about how to understand Oracle Buffer. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods, hoping to answer "how to manage" to everyone.

2022-05-31 Database 我要分享

[Oracle Script] check latch

Select l.latch# latch,l.name, nvl (c.latches, 0) children, l.gets, l.misses, l.gets-l.misses "Simple

2022-06-01 Database 我要分享

How to implement a spin lock in SQL Server

In this issue, the editor will bring you about how to achieve a spin lock in SQL Server. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article. Why do we need spin locks? Synchronize multiple threads with latches

2022-05-31 Database 我要分享

Principle Analysis of SQL Server main memory Database

In the process of seeking their own breakthrough and development, memory and distributed database are the most popular topics at present, which coincides with the requirements of performance and scalability in big data era. As a traditional database, SQL Server is also in the latest release.

2022-06-01 Database 我要分享

What are the interview questions for Oracle lock?

This article introduces the relevant knowledge of "what are the interview questions of Oracle lock". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something! May I ask Ora

2022-05-31 Database 我要分享

Oracle Least Recently Used Chains

LRU Chains (or LRU lists) has their related algorithms modified many times in the past. Although the algorithm has been modified, the function of LRU chain remains the same: to help the frequently accessed buffer is built into cache and help server

2022-06-01 Database 我要分享

How to solve the problem of latch:cache buffers chains error in SQL

This article mainly introduces the relevant knowledge of how to solve the latch:cache buffers chains error in SQL, the content is detailed and easy to understand, the operation is simple and quick, and has a certain reference value. I believe that latch:cac appears in this SQL after reading this article.

2022-05-31 Database 我要分享

Performance tuning methodology

1. Who will tune the database administrator, application architect, application designer, OS system administrator, storage system administrator, what does DBA do in tuning 1) Application tuning (DBA and developers work together) SQL statement performance Ch

2022-06-03 Internet Technology 我要分享

What is the ORACLE locking mechanism?

In this issue, the editor will bring you about what the ORACLE locking mechanism is. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article. Http://blog.csdn.net/xujinya

2022-05-31 Database 我要分享

SQL execution of Oracle

1. Oracle Concepts Guide explains every part of SQL language and database in detail. People who are advised to use Oracle should read "Oracle Concepts Guide". 2. Shared pool and database cache

2022-06-01 Database 我要分享

How to sort out Enqueue

How to sort out Enqueue, in view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way. When dealing with enqueue waits, keep these points in mind: 1 Enqueu

2022-06-01 Servers 我要分享

Understanding of oracle parallel parallel setup

Introduction: oracle parallelism has not been paid much attention to before. A few days ago, a brother encountered a problem that made me feel that this thing still has a lot to pay attention to, and it is necessary to be familiar with it carefully. In fact, the problem encountered is not complicated: a statement similar to the following: insert in

2022-06-01 Database 我要分享

V$LATCH_CHILDREN view

Http://docs.oracle.com/database/121/REFRN/refrn30109.htmV$LATCH_CHILDRENV$LATCH_CHILDREN displays st

2022-06-01 Database 我要分享

Why to use latch Latch in ICG Cell

Why to use latch Latch in ICG Cell, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something. Here is the gated clock (clock g)

2022-06-01 Internet Technology 我要分享

How to understand latch

In this issue, the editor will bring you about how to understand latch. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article. 1. Serialization Overview the database system itself is a multi-user concurrent processing system, at the same time

2022-05-31 Database 我要分享

Analysis of oracle waiting event Type wait_class

Oracle waits for the analysis of event type wait_class, and it is believed that many inexperienced people are at a loss about it. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem. The wait event of Oracle measures the operation of the database

2022-05-31 Database 我要分享

Optimization of waiting event LOG FILE SYNC (awr) for oracle

Log file sycn is one of the most common waiting events in ORACLE. In general, the waiting time of log file sycn is very short 1-5ms, so there will be no problem, but when something goes wrong, it is often difficult to solve. When will log f be generated?

2022-06-01 Database 我要分享