# Upgrading Cacti under Windows

Download latest stable version of Cacti which is referred to as `cacti-xxx.zip` in this document.

1. Stop poller.

   - Cacti Console

   - Configuration

   - Settings

   - Poller

   - uncheck Data Collection Enabled and Save

2. Run Command Prompt as administrator and backup database.

       shell> cd Documents
       shell> "\Program Files\MySQL\MySQL Server 5.7\bin\mysqldump.exe" -uroot -p -l --add-drop-table cacti > cacti-version-YYYYMMDD.sql

3. Backup the old Cacti directory.

       shell> cd \inetpub\wwwroot
       shell> robocopy cacti cacti-version-YYYYMMDD /s /b /copyall

4. Windows Update

5. MySQL

   - Open `MySQL Installer - Community`

   - update Catalog

   - upgrade MySQL Server

6. PHP

   - Backup `C:\php\` folder

   - Download a supported version of PHP for Windows using the appropriate build for IIS or Apache. If missing, install the appropriate VC build.

   - Overwrite `C:\php\` folder contents from zip file.

7. Overwrite new Cacti version to production folder. Extract contents of `cacti-xxx` folder in `cacti-xxx.zip` to `C:\inetpub\wwwroot\cacti\` and replace files.

8. Edit `include/config.php` and specify the MySQL user, password and database for your Cacti configuration.

       shell> notepad cacti/include/config.php

       $database_type = "mysql";
       $database_default = "cacti";
       $database_hostname = "localhost";
       $database_username = "cactiuser";
       $database_password = "cacti";

9. Point your web browser to: `http://localhost/cacti/`

   Follow the on-screen instructions so your database can be updated to the new version.

   Open "MySQL 5.7 Command Line Client" and set variables as needed in following format:

       set global max_allowed_packet = 16777216;
       set global tmp_table_size = 67108864;
       set global join_buffer_size = 67108864;
       set global innodb_flush_log_at_timeout = 3;

10. Start poller

    - Cacti Console

    - Configuration

    - Settings

    - Poller

    - check Data Collection Enabled and Save

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