Google search links lead to pages with very old content

I have a website that is updated fairly often... it has only been online since Jan (about 3 months). For the sake of this post let's call it www.xyz.com

I don't manually update the site, the site gets new content from users and the backend stores the website content and serves it up conditionally (paged, sorted by date, etc).

At any rate, my issue is that when I do a Google search, I find a link to my website... www.xyz.com and that works just fine... but Google also lists individual pages of my site in the search ressults. So fo example:

• news - www.xyz.com


• contacts - www.xyz.com


• about - www.xyz.com

If I click "news - www.xyz.com" in the Google search results I get my website content as it was 3 months ago on that page. If once I'm on my website and navigate internally, I get up to date content, even if I navigate back to the news page. This leads me to think Google has cached and indexed my pages.

The problem is, obviously that if a user gets to one of my pages via a google search link, they will get content 3 months old.

I can't manually ask Google to re-crawls my site every time a new post is made. I don't create content, users do.

How can I fix this without negatively affecting:

1. Performance


2. Google ranking

Thanks. Yes, I've searched for answers ;-) There are posts about pages that no longer exist and such due to an old website being re-written/coded, that is not my issue. The html,css,javascript, html dir struct hasn't changed,just the content in the data base which is served up by PHP as content.