I have a site having more than 50,000 pages. Google has not indexed all the pages . How long google will take to index all those pages? This is my site jobsinplanet.com .
That's a difficult question. Probably, Google will never index all of them. What percentage are currently being indexed? You might also check in Google Webmaster Tools to see how many pages are being crawled, etc. If Google is crawling your pages but not indexing, then they are making a choice to exclude them for some reason.
You might also look at your internal linking structure, etc. If you have problems there Google might be just missing some content because it can't find it.
Long story short, there can be a lot of reasons Google isn't indexing all your content.
Are each and every one of these pages original content? Duplicate content will never get indexed in SERPs.
To lift pages up into SERPs, build deep links to the important pages, and ensure you submit an up to date Sitemap!