MySQL - slow query log analysis
Article catalogue
MySQL - slow query log analysis
1. Start and set slow query log2. Data preparation3. Slow query log analysis tool: mysqldumpslow4. Delete slow query log5,show profile
MySQL - slow query log analysis
MySQL's slow query log is a kind of log record provided by mysql. It is used to record the statements whose response ...
Posted by razvypp on Tue, 02 Aug 2022 21:39:47 +0300
LRU and LFU algorithm (page replacement algorithm)
Differences between LRU and LFU
Both LRU and LFU are page replacement algorithms for memory management.
LRU: Least Recently Used (longest time) elimination algorithm. LRU is the page that has not been used for the longest time.
LFU: Least Frequently Used. LFU is the least used page in a period of time.
example
Assume that th ...
Posted by latinofever on Mon, 01 Aug 2022 21:07:12 +0300
SpringBoot integration springcloud Alibaba Seata details
SpringCloud Alibab-Seata Introduction:
Seata is an open source distributed transaction solution, which is committed to providing high-performance and easy-to-use distributed transaction services under the microservice architecture.
Seata will provide users with AT, TCC, SAGA and XA transaction modes to create a one-stop distributed soluti ...
Posted by kporter.porter on Sun, 31 Jul 2022 21:07:19 +0300
Quickly master MyBatis framework
Article catalogue
1, Foreword
1.1 database and table1.2 entity class1.3 MyBatisX plug-in1.4 SQL log view configuration 2, Multi table query
2.1 one to one2.2 one to many 3, Dynamic SQL usage
3.1 < if > label3.2 < trim > label3.3 < where > label3.4 < set > label3.5 < foreach > label
1, Forewor ...
Posted by mithras on Sat, 30 Jul 2022 21:38:10 +0300
Springboot Alipay sandbox payment - complete and detailed steps
1. Enter Alipay development platform sandbox environment
Sandbox environment - Alipay Document Center
1.1. Enter personal sandbox environment
Click to enter the sandbox environment and log in with Alipay Sandbox management interface is shown in the figure
appid, Alipay gateway, custom key, etc Here is the account number and password of ...
Posted by Mike-2003 on Sat, 30 Jul 2022 21:14:49 +0300
Basic syntax of MySQL DDL and DML and DQL
preface
SQL statement, namely structured query language, is a programming language for special purposes. It is a database query and programming language, which is used to access data, query, update and manage relational database systems. It is also an extension of database files.
The SQL statements specified in the SQL standard are divided in ...
Posted by Noctagon on Sat, 30 Jul 2022 09:58:45 +0300
Understanding and use of ThreadLocal
Understanding and use of ThreadLocal
When multiple threads access the same shared variable, they are particularly prone to concurrency problems, especially when multiple threads need to write to a shared variable. In order to ensure thread safety, general users need to synchronize appropriately when accessing shared variables.
The syn ...
Posted by carlmty on Tue, 24 May 2022 17:07:06 +0300
Leetcode Best Time to Buy and Sell Stock series topic analysis and java implementation
Leetcode Best Time to Buy and Sell Stock series topic analysis and java implementation
The title of this series is to allow us to trade according to restrictions in a continuous period of stock prices to maximize profits. Each derivative title will set some restrictions
Best Time to Buy and Sell Stock I
Best Time to Buy and Sell Stock II
Best ...
Posted by Karlos2394 on Sun, 22 May 2022 21:32:50 +0300
How to Realize Breakpoint Continuation of Large Files Similar to Baidu Disk
Catalog
background
Implement small file upload as a whole
Build Front End Environment
Setting up a service-side environment
How to Upload Large Files in Pieces
Client implementation slicing
Client computing hash
Client Upload Slices
Server Implements Check Interface
Server Implements Piecewise Upload Interface
Service side implements me ...
Posted by doforumda on Sun, 22 May 2022 20:42:59 +0300
Invest in a milk tea shop and coffee shop (code implementation) [the web page can be modified by yourself]
catalogue
1 investment
2 coffee shop code display
2.1 ideological source
2.2? Pictures and videos
2.3 code
2.4 write at the end?
1 investment
**There is only one criterion for real investment, that is, whether it is creating real value and whether this value is beneficial to the overall prosperity of society** Adhering to this standar ...
Posted by solar_ninja on Fri, 20 May 2022 23:52:30 +0300