#MySQL8

[darkstarnetwork43]

Unknown collation: utf8mb4_0900_ai_ci

Experienced “Unknown collation: utf8mb4_0900_ai_ci” when i was trying to import a database on a new server. Didn’t realize that the dump was created on a server with MySQL8 and i was trying to import it in MariaDB-10.5. FYI – The “ai” in the collation name stands for “accent insensitive” and the “ci” stands for “case insensitive. One of the solutions i stumbled upon, recommended i replace…

[db-engines-opensource]

InnoDB Cluster (High Availability setup for MySQL)

InnoDB Cluster (High Availability setup for MySQL)

InnoDB cluster is a complete high availability solution for MySQL. It uses a group replication mechanism with the help of AdminAPI. We can configure the setup very easily by using the MySQL shell utility.

We can use MySQL Router on top of the cluster to route traffic to backend database nodes. It can be used to split READ and WRITE requests using different proxy ports. It can provide more…

[info-comp]

В этом видео подробно рассмотрен процесс установки MySQL 8 в редакции Community на операционную систему Windows 10

[teldesalfi]

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[akubi0w1]

MySQL5.7とMySQL8の違いとは

ざっくりまとめ

8.0でできるようになったこと

CTE(Common Table Expressions)

With句が使用可能

Window関数が使用可能

権限管理がロール単位で可能

ユーザごとの管理より粒度が細かい

ドキュメントストアが追加された

NoSQL DBがが追加されたイメージ

JSONサポート強化

JSON -> RDBテーブルに変換できる関数などの追加

GIS(Geographic Information System): SRS(Spatial Reference Systems)をサポート

位置管理...？

デフォルトcharsetがutf8mb4

絵文字とかに対応しているcharsetだね

降順インデックスの追加

インビジブルインデックス(不可視索引)

8.0で廃止になったこと

クエリーキャッシュ

SQLのクエリと結果をキャッシュして、同じ文ならキャッシュを使う、っていうのが廃止

古いTIME型、TIMESTAMP型の廃止

ref

https://qiita.com/kota-miyasaka/items/65a6a1b7bed24771c01d

https://www.mysql.com/jp/products/enterprise/database/

http://nippondanji.blogspot.com/2018/05/mysql-80.html

http://blog.s-style.co.jp/2018/07/2123/

[imzers]

mysql 8 debian max-limit tasks

mysql 8 debian max-limit tasks

If you need to increas max task on your mysql8 server specially on Debian or Ubuntu # service mysql status Install MySQL8 with Ubuntu/Debian APT /lib/systemd/system/mysql.service [Service] User=mysql Group=mysql Type=notify PermissionsStartOnly=true ExecStartPre=/usr/share/mysql-8.0/mysql-systemd-start pre ExecStart=/usr/sbin/mysqld TimeoutSec=0 LimitNOFILE =…

[globalmediacampaign]

MySQL 8.0.22: SHOW PROCESSLIST Version 2 – Now Available From PERFORMANCE_SCHEMA

The “SHOW PROCESSLIST” command is very famous and very useful for MySQL DBAs. It will help you to understand the ongoing thread activities and their current states. By default, the “show processlist” output details will be collected from the thread manager, and it needs the global mutex. From MySQL 8.0.22, we have an alternative way to get the process details from the PERFORMANCE_SCHEMA. It doesn’t need the global mutex. 🙂 Note: We also have the non-blocking SYS schema views “processlist” and “x$processlist”, which provide more complete information than the SHOW PROCESSLIST statement and the INFORMATION_SCHEMA.PROCESSLIST and PERFORMANCE_SCHEMA.PROCESSLIST. But, we can’t integrate this with the “SHOW PROCESSLIST” command. In this blog, I am going to explain the complete details about the new processlist implementation using PERFORMANCE_SCHEMA. “SHOW PROCESSLIST” Using Thread Manager (default) This is the default method. The default “show processlist” implementation iterates across active threads from within the thread manager while holding a global mutex. Negatively impacts performance. Particularly impacts the busy systems quite badly. The INFORMATION_SCHEMA.PROCESSLIST is one of the sources of process information. This will also use the thread manager to collect the metrics. By default, “mysqladmin processlist” also uses the thread manager to get the details. The following statements are equivalent: SHOW FULL PROCESSLIST; SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST; Mysqladmin processlist --verbose “SHOW PROCESSLIST” Using Performance Schema Available from MySQL 8.0.22. It collects the thread details from the PERFORMANCE_SCHEMA>PROCESSLIST table. Global mutex is not needed. Helps to avoid the performance impact during querying the “show processlist”, particularly in busy systems. The implementation also applies to “mysqladmin processlist” The following statements are equivalent: SHOW FULL PROCESSLIST; SELECT * FROM PERFORMANCE_SCHEMA.PROCESSLIST; Mysqladmin processlist --verbose “PERFORMANCE_SCHEMA.PROCESSLIST” table has similar columns as “INFORMATION_SCHEMA.PROCESSLIST” mysql> desc performance_schema.processlist; +---------+-----------------+------+-----+---------+-------+ | Field   | Type            | Null | Key | Default | Extra | +---------+-----------------+------+-----+---------+-------+ | ID      | bigint unsigned | NO   | PRI | NULL    |       | | USER    | varchar(32)     | YES  |     | NULL    |       | | HOST    | varchar(255)    | YES  |     | NULL    |       | | DB      | varchar(64)     | YES  |     | NULL    |       | | COMMAND | varchar(16)     | YES  |     | NULL    |       | | TIME    | bigint          | YES  |     | NULL    |       | | STATE   | varchar(64)     | YES  |     | NULL    |       | | INFO    | longtext        | YES  |     | NULL    |       | +---------+-----------------+------+-----+---------+-------+ 8 rows in set (0.00 sec) mysql> desc information_schema.processlist; +---------+-----------------+------+-----+---------+-------+ | Field   | Type            | Null | Key | Default | Extra | +---------+-----------------+------+-----+---------+-------+ | ID      | bigint unsigned | NO   |     |         |       | | USER    | varchar(32)     | NO   |     |         |       | | HOST    | varchar(261)    | NO   |     |         |       | | DB      | varchar(64)     | YES  |     |         |       | | COMMAND | varchar(16)     | NO   |     |         |       | | TIME    | int             | NO   |     |         |       | | STATE   | varchar(64)     | YES  |     |         |       | | INFO    | varchar(65535)  | YES  |     |         |       | +---------+-----------------+------+-----+---------+-------+ 8 rows in set (0.00 sec) Implementation Make sure the PERFORMANCE_SCHEMA is enabled at the server startup. Make sure MySQL was configured and built with the thread instrumentations enabled. MySQL provides a variable “performance_schema_show_processlist” to enable this feature. Once we enable the variable, the “SHOW PROCESSLIST” command will start to show the details from the “PERFORMANCE_SCHEMA.PROCESSLIST” table instead of the thread manager. The variable has a global scope, no need to restart the MySQL server. mysql> show global variables like 'performance_schema_show_processlist'; +-------------------------------------+-------+ | Variable_name                       | Value | +-------------------------------------+-------+ | performance_schema_show_processlist | OFF   | +-------------------------------------+-------+ 1 row in set (0.08 sec) mysql> set global performance_schema_show_processlist='ON'; Query OK, 0 rows affected (0.00 sec) mysql> r Connection id:    23 Current database: *** NONE *** mysql> show global variables like 'performance_schema_show_processlist'; +-------------------------------------+-------+ | Variable_name                       | Value | +-------------------------------------+-------+ | performance_schema_show_processlist | ON    | +-------------------------------------+-------+ 1 row in set (0.00 sec) Yes, the PERFORMANCE_SCHEMA.PROCESSLIST table is activated for the “SHOW PROCESSLIST”. “SHOW PROCESSLIST” output from “PERFORMANCE_SCHEMA”: mysql> show processlistG *************************** 1. row ***************************      Id: 5    User: event_scheduler    Host: localhost      db: NULL Command: Daemon    Time: 2461   State: Waiting on empty queue    Info: NULL *************************** 2. row ***************************      Id: 23    User: root    Host: localhost      db: NULL Command: Query    Time: 0   State: executing    Info: show processlist 2 rows in set (0.00 sec) You can also query the “performance_schema.processlist” table to get the thread information. mysql> select * from performance_schema.processlistG *************************** 1. row ***************************      ID: 5    USER: event_scheduler    HOST: localhost      DB: NULL COMMAND: Daemon    TIME: 2448   STATE: Waiting on empty queue    INFO: NULL *************************** 2. row ***************************      ID: 23    USER: root    HOST: localhost      DB: NULL COMMAND: Query    TIME: 0   STATE: executing    INFO: select * from performance_schema.processlist 2 rows in set (0.00 sec) “mysqladmin processlist” output from “performance_schema”: [root@mysql8 vagrant]# mysqladmin processlist +----+-----------------+-----------+----+---------+------+------------------------+------------------+ | Id | User            | Host      | db | Command | Time | State                  | Info             | +----+-----------------+-----------+----+---------+------+------------------------+------------------+ | 5  | event_scheduler | localhost |    | Daemon  | 2631 | Waiting on empty queue |                  | | 24 | root            | localhost |    | Query   | 0    | executing              | show processlist | +----+-----------------+-----------+----+---------+------+------------------------+------------------+ Recommendations To avoid having some threads ignored, leave the “performance_schema_max_thread_instances” and “performance_schema_max_thread_classes” system variables set to their default value (default = -1, meaning the parameter will be autosized during the server startup). To avoid having some STATE column values be empty, leave the “performance_schema_max_stage_classes” system variable set to its default (default = -1, meaning the parameter will be autosized during the server startup). https://www.percona.com/blog/2021/01/15/mysql-8-0-22-show-processlist-version-2-now-available-from-performance_schema/

[amuawia]

Post has been published on http://muawia.com/mysql8-cluster-and-networking-problems/

MySQL8 Cluster and Networking Problems

[knowarth]

KNOWARTH Technologies, a leading enterprise portal development company are delighted to announce a publishing of a new book by our fellow KAites. The name of the book is MySQL 8 for Big Data and comes on the heels of book reviews on Building Serverless Web Apps and Building Web Apps with Spring 5 and Angular.

[e-commerce-magento]

RT @nizar_mg: #Magento 2.4.0 is ready and will GA on 7/28 along with the composer upgrade plugin. Lots of new features and platform upgrades like PHP 7.4, Mysql8, B2B Order approval rules and much more.

#Magento 2.4.0 is ready and will GA on 7/28 along with the composer upgrade plugin. Lots of new features and platform upgrades like PHP 7.4, Mysql8, B2B Order approval rules and much more.

— Nizar (@nizar_mg) July 22, 2020

from Twitter https://twitter.com/fbeardev

[sysadminxpert]

Steps to Install MySQL8 on CentOS or Amazon Linux

In this tutorial, we will explain the Steps to Install MySQL8 on CentOS or Amazon Linux using the MySQL Yum Repository.

MySQL Yum repository for Oracle Linux, Red Hat Enterprise Linux, CentOS, and Fedora.

Step 1: Install WGET command on Linux

$ sudo yum install wget -y

Step 2: Download MySQL Yum Repository

This is the one-time operation you need to set up on your Linux server. Download link is…

[lxgzhw]

Mac配置Nginx1.5+PHP7.1+MySQL8教程

安装MySQL

1 brew install mysql

2 mysql.server start

3 mysql_secure_installation

这里设置密码的时候至少要字母加数字组合

4 mysql -uroot -p

5 use mysql

6 create user 'lxgzhw'@'%' identified by 'lxgzhw123456';

7 grant all privileges on *.* to 'lxgzhw'@'%';

8 flush privileges;

安装PHP Nginx

1 brew install php@7.1 nginx

配置PHP和Nginx

vim /usr/local/etc/nginx/nginx.conf user zhangdapeng staff; worker_processes auto;

放在最顶部

[webdesignersolutions]

My situation: been working on a client’s project. Using WAMP for local development and a DO lamp droplet for online testing.

Using namecheap for domain and DNS.

I’m not a server guy… and I don’t want to take the responsibility for maintaining the security of the server side of things (it’s already enough work making sure the code itself is secure enough).

Requirements:

PHP7.3

MySQL8 (not 5.x!)

Redis

.htaccess (or equivalent if easy to use)

I’d prefer if I could use my DO droplets, but it’s not a hard requirements.

Priorities:

Managed server security (managed updates/patching)

Regular back-ups

Server resource monitoring/warnings

SSL management would be a big plus.

I’ve done some googling, and I’ve found a ton of possible PaaS and SaaS like cloudways, runclouds, serverpilot and many more, but choosing which one to go with in the end is becoming quite a chore.

Advice?

Edit: expected load is about 200k pages per month, don’t want AWS complexity servers/pricing.

Submitted March 08, 2019 at 08:28PM by EdgeBeDi https://www.reddit.com/r/webhosting/comments/ayz422/managed_vps_recommendations/?utm_source=ifttt

from Blogger http://webdesignersolutions1.blogspot.com/2019/03/managed-vps-recommendations.html via IFTTT

[entlizm]

via PHPタグが付けられた新着記事 - Qiita