MySQL Pressure Test Tool

Mysqlslap: MySQL's own stress testing toolmysqlslap is the benchmark tool that comes with mysql. It queries data, has simple syntax, is flexible and easy to use. It can simulate multiple clients concurrently sending query updates to the server, gives performance test data, and provides performance comparison of various engines.mysqlslap provid ...

Posted on Tue, 26 May 2020 09:29:37 -0700 by Bramme

Develop blog project based on abp vNext and. NET Core - perfect and beautify, Swagger comes on stage

Last article( https://www.cnblogs.com/meowv/p/12896898.html )The blog project has been successfully run, so this article is mainly to solve the problems left before. Now the code seems to be confused. There are a lot of unrelated codes in it, which is really zero tolerance for obsessive-compulsive patients. In the world of programmers, there i ...

Posted on Mon, 18 May 2020 19:13:37 -0700 by suresh_nsnguys

Talk about debezium's snapshot change record emitter

order This paper mainly studies the snapshot change record emitter of debezium SnapshotChangeRecordEmitter debezium-v1.1.1.Final/debezium-core/src/main/java/io/debezium/relational/SnapshotChangeRecordEmitter.java public class SnapshotChangeRecordEmitter extends RelationalChangeRecordEmitter { private final Object[] row; public Snapsho ...

Posted on Wed, 13 May 2020 08:50:06 -0700 by Stonewall

String similarity processing function

oracle queries, for example, the jobs related to table SALES in stored procedures SELECT * FROM (SELECT a.name,upper(b.what)AS what,SYS.UTL_MATCH.edit_distance_similarity (a.name,upper(b.what)) AS similarity FROM dba_source a,dba_jobs b WHERE SYS.UTL_MATCH.edit_distance_similarity(a.name,upper(b.what))>80 AND upper(a.text) LIK ...

Posted on Mon, 04 May 2020 16:33:26 -0700 by tartou2

PostgreSQL solves the shortest path

Some businesses need to solve the shortest path. A pgrouting plug-in in PostgreSQL has algorithms related to calculating the shortest path built in.Here's an example Table definition postgres=# \d testpath Table "public.testpath" Column | Type | Collation | Nullable | Default --------+---------+-----------+----------+-------- ...

Posted on Sun, 26 Apr 2020 19:41:13 -0700 by astoller

How to access PostgreSQL database by function calculation

Function Compute: Function calculation It is an event driven all tuoguan computing service. With function computing, you don't need to purchase and manage infrastructure such as servers, just write and upload code. Function calculation provides you with computing resources, runs tasks flexibly and reliably, and provides functions such as log ...

Posted on Sun, 26 Apr 2020 06:41:16 -0700 by cunoodle2

[open source]. NETCORE. Netframework xamarin uses ORM FreeSql to access MySql/Mariadb

1. Create project We use the console type project to test the insertion, deletion, update, query and other functions, create a console project, and use the command: dotnet new console dotnet add package FreeSql.Provider.MySql dotnet add package FreeSql.Repository 2. Create a solid model using System; using FreeSql.DataAnnotations; publ ...

Posted on Wed, 22 Apr 2020 07:05:10 -0700 by talltorp

Setting the validity period of user password in Postgresql

Test environment: Server 192.168.137.222 highgodb v4.1.1 corresponds to PostgreSQL V9.5 Client 192.168.137.220 1) Create a test user at the highgo user of host 192.168.137.222 and set the password Expiration: [highgo@hgdb01 ~]$ psql psql (4.1.1) PSQL: Release 4.1.1 Connected to: HighGo Database V4.1 Enterprise Ed ...

Posted on Fri, 03 Apr 2020 17:55:50 -0700 by harrymanjan

PostgreSQL uses functions to implement the merge function

PostgreSQL uses functions to implement the merge function Experimental environment Operating system: windows 10 home Chinese Database system: PostgreSQL 9.6.2 Explain The oracle database has the merge function, which can be judged before inserting data: if the specified column data does not exist, the data will ...

Posted on Thu, 02 Apr 2020 19:09:51 -0700 by rockroka

The effect of data table flags on query performance

The influence of flag bits on query performance. The example database uses PostgreSQL drop table if exists test; drop function if exists gen_random_zh(int,int); drop function if exists get_next_index(tweights[]); drop type if exists tweights; /************************************************************************ ...

Posted on Thu, 02 Apr 2020 14:22:01 -0700 by HaXoRL33T