there are three existing servers (all mysql5.7 installed by centos7,): br 10.19.6.6 BRV 192.168.3.101 CRAV 192.168.3.102 use xtrabackup to back up A s MYSQL data, then restore to B A s database to deactivate, and B updates the primary database d...
problem description take over a new database, today found table data 50G, and then various indexes 75G, of which three large indexes are each around 23g, and most of the large indexes are bound to timestamps. what result do you expect? What is the e...
for example, in the master-slave replication architecture of mysql, SQL threads often fail to execute and lead to replication being stranded. I want to know how people generally deal with this situation ...
High performance MySQL (3rd edition, 1st edition, May 2013) on page 390, it is mentioned that the current generation of RDBMS technology has been optimized for mechanical hard drives for decades, and the same mature and in-depth research work has not re...
mongodb also seems to have the concept of connection pooling. The default maximum number of connections is 1024, and each connection consumes a certain amount of memory resources. How to understand this "connection " of mongobd? For example, in node,...
use python to read the excel table and find out whether each sentence is marked with . (Chinese full stop) end. But it seems that because of the coding problem, pycharm recognized ? A question mark, an unrecognizable meaning. How to solve this codin...
style? of:: before cannot be dynamically added to vue ...
entry: [ webpack-dev-server8080 webpack-dev-server client?http: localhost:8080 , only-dev-server only- webpack hot only-dev-server , webpackwebpack-dev-server . webpack.entry.js ], when I want to co...
Business requirements need to be highly adaptive to el-table some related codes el-table part <el-table style="width: 100%" ref="topictable" :height="tableHeight" :data="...