Counts the number of users, categories, posts, comments, pages, links, tags, link-categories, words in posts, words in comments and words in pages.
Some attributes, especially the ones which count
words in ..., need more memory and CPU-time to be executed.
For performance optimization, you can play around with the
Rows at Once parameter in the
Performance tab, which represents the number of database rows processed at once. In other words, if your weblog consists of 1,200 comments and you want to count the words in comments with a
Rows at once value set to 100, it will take 12 sql-queries. This may be much or less, depending on your provider's environment and the size of your weblog. Hence, this setting cannot be automatically calculated because it is not easily predictable. So, it is up to you to optimize this setting.
Nevertheless, for smaller weblogs the default value of 100 "Rows at once" should be appropriate.
In WordPress 3.5 and higher the Link Manager (aka Blogroll) has been deactivated by default. - In order to re-activate it you need to download the Link Manager Plugin.