I found this problem while generating google-sitemap
# The last run didn't finish! Maybe you can raise the memory or time limit for PHP scripts. Learn more
# The last known memory usage of the script was 15MB, the limit of your server is 32M.
# The last known execution time of the script was 23.05 seconds, the limit of your server is 30 seconds.
# The script stopped around post number 3497 (+/- 100)
How do I resolved this problem.