// Handy #plugin  for #WordPress : WP-Optimize will give you the option to clear revisions, draft posts and spam/pending comments and also optimise your database tables, freeing up value disk space and speeding up all database access.

That said, if you use the Google+ Blog plugin http://bit.ly/yNwPxo by +Daniel Treadwell to import your G+ posts in WordPress, you may want to check the size of your posts table. With just 440 posts there were almost 130.000 rows in my posts table, the likely cause being the Google+ Blog plugin. 

Get WP-Optimize here http://bit.ly/WBF81q