15000 commands & over loading :how can I solve it?

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the default theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

Yes I do many thing like:

deactivating all plugin .
re-installing wordpress.
using cache plugin .
using memochach in php .
just showing 15 comments in page .
changing my host more than 6 time all of them say your blog use so cpu and ram.
analysing & optimising DB.

…

The comment is the last thing I thing maybe casing this overloading .
Is it possible ? it take 11Mb space in Db that is biger than 9Mb of post space in DB. (My DB size is 22MB)

What do you mean by “commands”? Are you perhaps referring to queries?

Command’s table size in database is about 11MB .

What do you mean by “commands”? Are you perhaps referring to queries?

so sorry for that writing I want to write “comments”. I really have mistake with this all word in this is “comments” not “command”.

wp_comments table

Do you wish to keep all of these comments?

Yes . they are question’s answers .

I really don’t know how can I solve this problem without spending more money for buy VPS or host.

just I thing if I load comment from other host it may be help? but how ?
Is it good to use other comment systems? if yes which one?

With that many Q&A, I think you may have to look at investing in a vps or even a dedicated server.