Merge pull request major#754 from jmrenouard/master

Merge doc

README.md

@@ -41,19 +41,21 @@ Compatibility
 
 Test result are available here: [Travis CI/MySQLTuner-perl](https://travis-ci.org/major/MySQLTuner-perl)
 
-* MySQL 8.0 (partial support, password checks don't work)
-* Percona Server 8.0 (partial support, password checks don't work)
-* MySQL 5.7 (full support)
-* Percona Server 5.7 (full support)
-* MariaDB 10.3 - 10.11 (full support)
+* MySQL 8.0, 8.2, 8.3 (full support)
+* Percona Server 8.0, 8.2, 8.3 (full support)
+* MariaDB 10.4, 10.5, 10.6, 10.11, 11.0, 11.1, 11.2 (full support)
 * Galera replication (full support)
 * Percona XtraDB cluster (full support)
 * Mysql Replications (partial support, no test environment)
 
+* MySQL 8.1 (not supported, deprecated version)
+* Percona Server 5.7 (not supported, deprecated version)
+* MySQL 5.7 (not supported, deprecated version)
 * MySQL 5.6 and earlier (not supported, deprecated version)
 * Percona Server 5.6 (not supported, deprecated version)
+* MariaDB 10.7, 10.8, 10.9, 10.10 (not supported, deprecated version)
+* MariaDB 10.3 and earlier (not supported, deprecated version)
 * MariaDB 5.5 (not supported, deprecated version)
-* MariaDB 10.2 and earlier (not supported, deprecated version)
 
 ***Windows Support is partial***
 
@@ -65,17 +67,22 @@ Test result are available here: [Travis CI/MySQLTuner-perl](https://travis-ci.or
 * Cloud based is not supported at this time (Help wanted! GCP, AWS, Azure support requested)
 
 ***Unsupported storage engines: PRs welcome***
+--
 
 * NDB is not supported feel free to create a Pull Request
-* MyISAM is too old and no longer active
-* RockDB
 * Archive
 * Spider
 * ColummStore
-* TokuDB
-* XtraDB
 * Connect
 
+Unmaintenained staff from MySQL or MariaDB:
+--
+
+* MyISAM is too old and no longer active
+* RockDB is not maintained anymore
+* TokuDB is not maintained anymore
+* XtraDB is not maintained anymore 
+
 * CVE vulnerabilities detection support from [https://cve.mitre.org](https://cve.mitre.org)
 
 ***MINIMAL REQUIREMENTS***
@@ -143,18 +150,40 @@ cd mysql-sys-master
 mysql -uroot -p < sys_56.sql
 ```
 
-Optional Performance schema and Sysschema installation for MariaDB < 10.6
+Performance schema setup
 --
 
-Sysschema is not installed by default under MariaDB prior to 10.6 [MariaDB sys](https://mariadb.com/kb/en/sys-schema/)
+By default, performance_schema is enabled and sysschema is installed on latest version.
+
+By default, on MariaDB, performance schema is disabled by default (MariaDB<10.6). 
 
-By default, on MariaDB, performance schema is disabled by default. consider activating performance schema across your my.cnf configuration file:
+Consider activating performance schema across your my.cnf configuration file:
 
 ```ini
 [mysqld]
 performance_schema = on
+performance-schema-consumer-events-statements-history-long = ON
+performance-schema-consumer-events-statements-history = ON
+performance-schema-consumer-events-statements-current = ON
+performance-schema-consumer-events-stages-current=ON
+performance-schema-consumer-events-stages-history=ON
+performance-schema-consumer-events-stages-history-long=ON
+performance-schema-consumer-events-transactions-current=ON
+performance-schema-consumer-events-transactions-history=ON
+performance-schema-consumer-events-transactions-history-long=ON
+performance-schema-consumer-events-waits-current=ON
+performance-schema-consumer-events-waits-history=ON
+performance-schema-consumer-events-waits-history-long=ON
+performance-schema-instrument='%=ON'
+max-digest-length=2048
+performance-schema-max-digest-length=2018
 ```
 
+Sysschema installation for MariaDB < 10.6
+--
+
+Sysschema is not installed by default under MariaDB prior to 10.6 [MariaDB sys](https://mariadb.com/kb/en/sys-schema/)
+
 You can follow this command to create a new database sys containing a useful view on Performance schema:
 
 ```bash
@@ -167,13 +196,27 @@ mysql -u root -p < ./sys_10.sql
 ```
 
 Errors & solutions for performance schema installation
+--
+
+
+ERROR 1054 (42S22) at line 78 in file: './views/p_s/metrics_56.sql': Unknown column 'STATUS' in 'field list'
+--
+
+
+This error can be safely ignored
+Consider using a recent MySQL/MariaDB version to avoid this kind of issue during sysschema installation
+
+In recent versions, sysschema is installed and integrated by default as sys schema (SHOW DATABASES)
+
+
 
 ERROR at line 21: Failed to open file './tables/sys_config_data_10.sql -- ported', error: 2
 Have a look at #452 solution given by @ericx
+--
 
 Fixing sysctl configuration (/etc/sysctl.conf)
---
 
+--
 It is a system wide setting and not a database setting: [Linux FS Kernel settings](https://www.kernel.org/doc/html/latest/admin-guide/sysctl/fs.html#id1)
 
 You can check its values via:
@@ -252,6 +295,14 @@ perl mysqltuner.pl --silent --reportfile /tmp/result_mysqltuner.txt --template=/
 
 __Important__: [Text::Template](https://metacpan.org/pod/Text::Template) module is mandatory for `--reportfile` and/or `--template` options, because this module is needed to generate appropriate output based on a text template.
 
+
+__Usage:__ Dumping all information_schema and sysschema views as csv file into results subdirectory
+
+```bash
+perl mysqltuner.pl --verbose --dumpdir=./result
+```
+
+
 __Usage:__ Enable debugging information
 
 ```bash