RoundCube very slow

My RoundCube webmail is extremely low and sometimes users can not even use it.

Code:

[mysqld]
local-infile=0
datadir=/home/mysql/
socket=/var/lib/mysql/mysql.sock
slow_query_log=1 
slow_query_log_file=mysql-slow.log 
long_query_time=0.2
#skip-locking
##skip-innodb
query_cache_limit=2M
query_cache_size=100M
query_cache_type=1
max_user_connections=100
max_connections=300
interactive_timeout=100
wait_timeout=15
connect_timeout=999
thread_cache_size=128
key_buffer_size=750M 
join_buffer=2M
join_buffer_size=1M
max_allowed_packet=512M
table_cache=6000
#record_buffer=1M
sort_buffer_size=256K
read_buffer_size=128K
myisam_sort_buffer_size=64M
server-id=1
federated

innodb_buffer_pool_size=2500M 

#[mysql.server]
#user=mysql
#basedir=/var/lib 

open_files_limit=50000
[safe_mysqld]
err-log=/var/log/mysqld.log
pid-file=/var/lib/mysql/mysql.pid

#[mysqldump]
#quick
#max_allowed_packet=16M

[mysql]
no-auto-rehash

[isamchk]
key_buffer=64M
sort_buffer=64M
read_buffer=16M
write_buffer=16M 

[myisamchk]
sort_buffer=64M
read_buffer=16M
write_buffer=16M

[mysqlhotcopy]
interactive-timeout

 

Mysql looks ok during this time. All others mysql process run fine.

 

Thanks to Vanessa I am considering this conversion, but I was told that all adress books of the email accounts will be lost after this conversion. Is there any fix to this situation?

 

Vanessa,

That information about the adress book was given by Platinum Staff, that administrate my servers.

Today some of our costumers are complaining about difficulties to use email even on Outlook caused by slowness and instability in the connection.

Have you ever worked with them? I like their sevices, but this issue is taking too long.

Thanks,

 

Great tip Vanessa. I have increased the max connections. Let's hope for the best.

I'll keep you informed.

May I add you on skype so we can discuss some business?

Att.,

 

Ok, i have increased it from 5 to 15.