i have a vps with 50 gb bandwith 128 mb ram and 5 gb storage limits,

however in plesk, it says me i am using the 99% of memory which is 5,8 gb and also %100 of swap which is 3,96

my site is only 42 mb and my database is 9.18 mb.. i have 680 users in my site

i had a invision board in my site, the highest online people is 100 however generally there are 15-20 people online and writing to the board. i thought that it causes some performance problems with my vps's ram. i closed the board, however it still shows that limits.. what could be the problem, how can i solve it?