How to add a lot of terms at once?

The way to add a lot of terms is to use Import. Follow Exchange → Import → Terms.

Recommended number of terms is 500. The number varies depending on server performance.

The process of importing terms is a complicated task. There are a lot of transformations with text during the process. You can import 100.000 terms on a local machine but a web-server, especially on shared hosting, allows to import 500 terms or less at best.

Importing large databases

These settings for php.ini help to import large databases:

1. max_execution_time = 3600 ; 1 hour
2. max_input_time = 3600
3. memory_limit = 64M
4. post_max_size = 64M
5. upload_max_filesize = 64M

Some hosters allow to change settings using .htaccess file:

1. php_value max_execution_time 3600
2. php_value max_input_time 3600
3. php_value memory_limit 64M
4. php_value post_max_size 64M
5. php_value upload_max_filesize 64M

A 60-MB XML-file imports during ~10 minutes on Intel Celeron 1.6 GHz.