Synchronize your public iCloud photostreams to your WordPress installation. Import images, create gallery posts, and more.
It might be that your server has running out of memory. You can try increasing the available php memory to your server. This plugin might help http://wordpress.org/plugins/memory-bump.
Photostream will not create the posts and media that have been imported already but will try to fetch the media that is not available in the database. However feel free to let it run in another tab while you browser the internet in diffrent browser window. You can see see the progress percentage in the tab.
Photostream relies on the WordPress Cron to update the media and galleries with new content that you have posted to your iCloud stream.
This means that if your website doesn't recieve much traffic your new content will not be imported as frequently. Since traffic to your site is what triggers the WordPress cron to do work.
You can always trigger a content refresh by clicking on the import link.
= I installed the plugin, added one or more streams, but I have no new posts. Why? ( pre 2.1 )=
This plugin uses uses WordPress built in work scheduling functionality to get its work done. It should try to do work every 15 minutes or so, but there are a couple of caveats. WordPress only does this work when people are visiting your site, and so if you're not getting a lot of "foot traffic" then it may take some time for the plugin to do its magic. Most times publicly indexed (by search engines like google) sites should manage to stay more or less up to date with the work that they need to do unless the traffic on the photostream is very heavy.
In cases where you don't want to wait for traffic, or your photostreams are very busy and you want instant updates you can take the advice of the following article to help make WordPress' scheduled work feature more... on schedule...
Lets say that your photostream url is https://www.icloud.com/photostream/#nnnnnnnnnnnnn. You can put in "https://www.icloud.com/photostream/#nnnnnnnnnnnnn" or "nnnnnnnnnnnnn". The plugin will validate what you put in as best as possible and try to figure out what you mean (and verify it by trying to fetch the stream from icloud.com) for you.