Hi, i need some help.
I have problems with mySQL. In some of my sites, i get warnings at the top of the pages:

Code: 
Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in  Warning: session_start() [function.session-start]: open(/tmp/sess_2768563f6f13c08c044c710c554aaa37, O_RDWR) failed: No space left on device (28) in /home/stranifi/public_html/musicvideo.php on line 17  Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/stranifi/public_html/musicvideo.php:17) in /home/stranifi/public_html/musicvideo.php on line 17  Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/stranifi/public_html/musicvideo.php:17) in /home/stranifi/public_html/musicvideo.php on line 17

Mentioned problems appeared suddenly. I didn't do anything.
My server configuration is:

HDD 2x 500 GB SATARAM
6 GB DDR2-RAM
CPU AMD Athlon 64 X2 3400+, Dual-Core
Template CentOS 6 - minimal - RAID 1

I have about 15k unique visitors every day.

My present my.cnf file looks like this:

Code: 
[mysqld]
set-variable = max_connections=500
query_cache_limit       = 2M
query_cache_size        = 256M
table_cache = 400
thread_cache_size = 286
log-slow-queries
safe-show-database
What i should tweak to get error disappear and get mySQL to work again?

THANKS,
Igor
igordr Reviewed by igordr on . Strange php and mySQL warining suddenly appeard Hi, i need some help. I have problems with mySQL. In some of my sites, i get warnings at the top of the pages: Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in Warning: session_start() : open(/tmp/sess_2768563f6f13c08c044c710c554aaa37, O_RDWR) failed: No space left on device (28) in /home/stranifi/public_html/musicvideo.php on line 17 Warning: session_start() : Cannot send session cookie - headers already sent by (output started at Rating: 5