Upgrading Drupal

Hi, everyone!

I have a problem with the xmlsitemap, first my website have only 30 nodes,
the xmlsitemap works finely, www.example.com/sitemap.xml listed all nodes
links.

when my website's nodes go up to 20,000 nodes, when i type
www.example.com/sitemap.xml, wait for a long time, and i got error:

Fatal error: Maximum execution time of 30 seconds exceeded in
D:\Web\my drupal\includes\database.mysql.inc on line 108

I am trying to upgrade a Drupal 5.21 site that was previously using vBDrupal. I have followed all best practice upgrade tactics (i.e., disabling all contrib modules, and deleting their folders from the server, deleting update_status module, etc). I copy over all my core Drupal 6.x files and then try running update.php and I get a white screen. When I try going to any other site area (/user, /admin) I get the following:

I am wanting to install a new installation of Drupal 6 in a subdirectory e.g. http://mydomain.com/drupal in order to test and configure the new site before going live. I then would like to to write a rewrite rule so that the the domain will access the site from the subdirectory without the subdirectory showing in the URL.

I read the upgrade instructions and I thought it would be easier not to change the theme for upgrading. But now that I've replaced the drupal files with the latest version nothing works.

What can I do to remedy this? I've tried the settings.php thing and I can't even get upgrade.php to open.

Hi, i have a problem with drupal search, i searched all the internet, cant found any answer:

I enable the clean urls, and the URL aliases works finely in all nodes, but in the search, when i type the words: blue+ or blue + , or any words including "+" , i got:
404 - File or directory not found.
and the url is http://www.example.com/search/node/blue%20%2B

i have tried another sign, like "&", i got the same problem.

can someone help me?

thanks.

I'm trying to upgrade a large longterm drupal installation from 5.x to 6.15. I've done a complete backup, and followed all the instructions in UPDGRADE.txt. As soon as I attempt to run update.php I get the following errors:

Warning: Unknown column 'serialized' in 'field list' query: SELECT data, created, headers, expire, serialized FROM cache WHERE cid = 'variables' in /home/illinipu/public_html/includes/database.mysql.inc on line 128