Truncate searchcore_text and postedithistory tables

[Saeed Fazlollahzadeh]

Hello, some tables are large and I don't to truncate them or not.
searchcore_text is the main one, about two point five gigabytes.
I'm using Google search and i don't use forum built-in search.
Can i empty this table?
What about searchlog?
I've googled and figured out what are these tables used for, but as I'm using Google search, I believe there's no need to these tables.
Appreciations

[Wayne Luke]

If you're not using the internal search, you can truncate the searchcore_text table.

You will lost the history of post edits and the ability to restore posts if you delete the postedithistory table.

[Saeed Fazlollahzadeh]

Thanks Wayne, yeah I know about postedithistory. I forgot to edit and replace it to searchlog.
What about searchlog table?
What does it contain?
It weighs not much, but I'm curious about it.

[Wayne Luke]

The searchlog holds temporary information on previous searches. This allows them to be shared among users. So if two users search for the same keywords, it can reuse a search instead of performing it twice. The entries should be deleted every hour. However as you're not using the internal search, it should be empty.