Adding thousands of pages

[Ride45]

We have enough "legitimate" content to produce 10,000+ pages... and add them to our site structure.
The site would increase from 1,700 pages to 12K+.
We would post all pages as part of the site update, but my question is, would this be a red flag for Google? Could we potentially get penalized for having 12K pages and with a sudden, huge jump?
Remember, it's all ethical, and what is posted would have real content value.

Thanks for your input.

[vik_c]

I suggest you do a phase by phase addition, don't add 10,000 pages in a single day. Break it up into four parts. If you do a search around here, you'll find some webmasters talking about getting buried in the serps after increasing pages substantially in number.
Also if you want to keep the same Pagerank, you'll probably need more inward links.

[itloc]

I would go and publish all at once. Content is always good - and it will take some time to index everything.

itloc

[LostOne]

Do it for your site visitors and not search engines. I get so tired of hearing the same old stuff--will it hurt me--does Google do this and that.

[anallawalla]

Exactly. If you have a catalogue site containing 100,000 pages of book titles, then each page is different and its contents are of value to a visitor. Upload all at once, but it could take a very long time to be crawled by Google.

[Ride45]

Thanks for the input. The content does add value for visitors and the overall user exprience.. We just don't want to hurt our positioning which is already in the top 3 for every major keyword we were after on Google, and I had heard somewhere before that adding a huge amount content all at once *may* be a red flag for Google, regardless of it's value to the site itself. I guess we'll give it a try and I'll report back the result.