Why such big difference of date in cached pages

[fraudcop]

I foud out there are almost 30 days difference in the cached date of my pages .

some have being cached last time the 27th of may, others the 25 of april or even the 13th of april.

I found out this yesterday, before they where cached every 10 days all within the same day

Any idea what has caused this?

thanks in advance for your answer

fraudcop

[msgraph]

Which search engine's cache are you looking at?

[fraudcop]

google in particular

[Dave_A]

A whole heap of websites are not being cached by google anymore or heaps are very old.
My understanding of this is because they have around eight billion websites to index and this takes a heap of time, so now they are being selective on what websites are visited by the web crawler and who is or isn't cached .
I recal reading an article about it a few weeks ago, they are now thought to be looking at making a priority listing depending on how long you may have registered the domain name for.
It may have been by searchenginepro but I am not sure about it.

[ilikeyou]

I have some 5000 or more pages that are cached from 5 months ago. All the pages are current and are updated weekly. Yet they are still 5 months old. I think google is just not large enough to grab the latest cache of every single page on larger sites.. it's just impossible.

Putting a CURRENT DATE function (through your programming language) on all pages can help.. that may be why web forums get updated more frequently.

Also putting a date in the footer's of your page may help. It changes the content of the website for you and could encourage more frequent caching.