[Plugin: Google XML Sitemaps] [plugin Google XML Sitmaps] The last run didn’t finish

Sorry for opening a new topic with the with the problem that already exists, but I couldn’t find appropriate solution anywhere.

Problem:
When I try to create XML sitemap I get
# The last run didn’t finish! Maybe you can raise the memory or time limit for PHP scripts.
# The last known memory usage of the script was 11.75MB, the limit of your server is 50M.
# The last known execution time of the script was 0.02 seconds, the limit of your server is 30 seconds.
# The script stopped around post number 6 (+/- 100)

Can anybody write all possible solutions (in one place), cause I have tried a lot of thing and nothing worked out.