Drupal 6.x

Hello everybody!
I have a server in Hetzner(EX10) and project on drupal6. Traffic to the site is about 700 anonymous users online. But when held at least 50 authorizations (or I testing with ab - 'ab -n 10000 -c 500 http://site/') - my site begins to slow down. Mysql create 90-100 sleep connections and nothing but sleep.
my.cnf

[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock

[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0

[mysqld]
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /dev/shm/
lc-messages-dir = /usr/share/mysql
skip-external-locking
skip-name-resolve
large_pages = 1
back_log = 500
max_connections = 250

key_buffer_size = 1G
max_allowed_packet = 16M
net_buffer_length = 64K
net_read_timeout = 15
net_write_timeout = 15
thread_stack = 192K
thread_cache_size = 400
myisam-recover = BACKUP
thread_concurrency = 64
query_cache_type = on
query_cache_limit = 24M
query_cache_size = 256M

wait_timeout = 30
interactive_timeout = 30

myisam_sort_buffer_size = 386M

join_buffer_size = 4M

I have install Drupal "6.28" on windows XP and it was installed successfully. But after installation I downloaded the theme "marinelli-6.x-2.96" at location sites/all/themes/ directory and I activated it and made it default one. Now my content page is coming but when ever I am clicking on the administrator page a blank page is coming (I tried it with themes aqua_marina and Fusion themes in the same way but its the same result. Pls help.......

Thanks
Bean

Can someone please point me in the right direction I am trying to find a module for comments and a user profile pic to show when a user leaves a message I am new to drupal i looked through modules could not find it Is this two seperate modules or one?

I haven't used Drupal in many years, yet I continue to get forum post updates that have no link to unsubscribe, and no clear, obvious way even when I log in and go to that forums post. When I go to "Notifications" it doesn't show me as being set up for any, yet I've received hundreds of emails.

Yes, I've Googled it. The only post I found was this:
http://drupal.org/node/1161650

...which is unresolved.

I just want to not receive any more emails from Drupal.org. How do I make this possible?

I have a script that is designed to redirect visitors to mysite to a mobile site with a different URL if they are using mobile devices.

The script is designed to reside in the index.html file in the head tag.

I am using a Drupal Multi-site setup and do not want to redirect all of the sites in it - just this one site.

So I think I need to add the script somewhere at or below /sites/mysite.com so that is does not affect the other sites in /sites/default
and /sites/myothersites.

Should I insert the script into /sites/mysite.com/settings.php? or?

I'm trying to do a fresh install of the latest Drupal 6 to restore a database then upgrade to Drupal 7. I can't get past the database setup because where normally under advanced options it would allow me to put in the database location, it simply says 'advanced options,' with nothing below it. This doesn't appear when I do a fresh install of Drupal 7, but I haven't been able to find a way to import a Drupal 6 database to a Drupal 7 site.