Is having a lot of inactive memory ok

Here is a picture tell me if this is ok

There is nothing wrong with having inactive memory.

but how come i dont have any free space

memory and hard drive space are completely different

Because you have a ton of stuff open.
Inactive memory is memory that is not currently being used, but contains data from an open app. It is allocated memory that hasn't been accessed during last few moments and quite likely to be first used for being swapped/paged out if memory being demanded.

Read this article for more info:

http://docs.info.apple.com/article.html?artnum=107918

basically it is being stored just in case you are going to need it again in the next few minutes....if you dont need it it wil get rid of it and use it for something else.

windows and osx have two very very different ways of managing ram
-chris

ok, im having the same problem and i have firefox, and transmission open along with tigers stuff, and i have 13mb of ram aviable, and when opening, minimizing, or closing apps, its real;y slow and choppy, i'v watched it for 15 mins now and it doesn;t release that ram.

i used transmission for a while and it hogs ram...as do the rest of torrent apps
....your ram will be freed up once something else needs it actually