Troubleshooting of MySQLTuner

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"MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stability."[1]

How to resolve: wget command not found[edit]

Condition: When I tried to download the MySQLTuner using wget command but met the error.

Solution:

  1. Download the installation file setup-x86_64.exe of Cygwin from Cygwin Installation
  2. Open the command line window
  3. To install the packages: wget. Keyin setup-x86_64.exe -q -P "wget" or follow the steps on terminal - WGET Command Not Working in Cygwin - Super User if you prefer the GUI window.

How to resolve: couldn't find diagnostic data[edit]

Condition:

$ perl mysqltuner.pl
couldn't find diagnostic data in /usr/share/perl5/5.26/pods/perldiag.pod /usr/local/lib/perl5/site_perl/5.26/x86_64-cygwin-threads /usr/local/share/perl5/site_perl/5.26 /usr/lib/perl5/vendor_perl/5.26/x86_64-cygwin-threads /usr/share/perl5/vendor_perl/5.26 /usr/lib/perl5/5.26/x86_64-cygwin-threads /usr/share/perl5/5.26 mysqltuner.pl at /usr/share/perl5/5.26/diagnostics.pm line 259, <POD_DIAG> line 711.
Compilation failed in require at mysqltuner.pl line 45.
BEGIN failed--compilation aborted at mysqltuner.pl line 45.

Solution:

  1. Download the installation file setup-x86_64.exe of Cygwin from Cygwin Installation
  2. Open the command line window
  3. To install the packages: perl_pods[2][3]. Keyin setup-x86_64.exe -q -P "perl_pods"

Environment:

  • Windows 2008 R2 standard
  • Cygwin version: CYGWIN_NT-6.1 Win2008R2-0-0 2.9.0(0.318/5/3) 2017-09-12 10:18 x86_64 Cygwin (information returned from uname -a)

How to resolve: Attempted to use login credentials, but they were invalid.[edit]

Condition:

$ perl mysqltuner.pl
 >>  MySQLTuner 1.7.5 - Major Hayden <[email protected]>
 >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/
 >>  Run with '--help' for additional options and output filtering
Please enter your MySQL administrative login: root
Please enter your MySQL administrative password: [!!] Attempted to use login credentials, but they were invalid.

Solution:

  • Specify the host parameter to command line e.g. perl mysqltuner.pl --host 127.0.0.1
  • Check the typo of mysql account and password

references[edit]


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