Forum 10000 vsitor perday totall resurce for server

[محروم.كوم]

Hi i have 10000 visitor on my vbulletin site. My corrent vps server total resource 786 ram cpu 2.3 . My site working well with xcache installed on it. Most time 30-50 percent resource taking. Problem is when site genarate sitemap, attchment and thread view site take 200 percent resurce and server automatic down server start again after 10 minite. Every day server down 3-4 hour. So what should i do now? Should i try upgrate resurce or move database to other server? Is it going to help about downtime? how much rame should i need for my website? __DEFINE_LIKE_SHARE__