2 Days ago my site is SUSPEND SO bad Feel

[tanzeelniazi]

i never change anything only buy a new server and restore backup

--------------- Added [DATE]1387009617[/DATE] at [TIME]1387009617[/TIME] ---------------

Ozzy Check PM please

--------------- Added [DATE]1387010805[/DATE] at [TIME]1387010805[/TIME] ---------------

If i use this
define('DISABLE_HOOKS', true);
now site decrease cpu usage and working fine

--------------- Added [DATE]1387011177[/DATE] at [TIME]1387011177[/TIME] ---------------

again usage 100% if disable hooks

--------------- Added [DATE]1387016129[/DATE] at [TIME]1387016129[/TIME] ---------------

Today i rec 1 more email from server he says:

Kindly be informed your domain registrar is not an issue here. Your domain is consuming more resources which need to be optimized.

Please optimize your domain and avoid further issues.

how to optimize Domain ?

--------------- Added [DATE]1387037384[/DATE] at [TIME]1387037384[/TIME] ---------------

Now i find i am under attack DDOS help please so many Ips going to 1 thread
how to block these Ips please help

--------------- Added [DATE]1387059536[/DATE] at [TIME]1387059536[/TIME] ---------------

Some one trying to attack in 1 file how to Block Urgent help please please
Attack in showthread.php

 I could see that your domain still consuming more I/O usage in server. Please refer the below pasted log snippet.

============
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

490886 MyHome 20 0 140m 27m 7500 R 10.3 0.2 0:01.06 lsphp5:/home/MyHome/public_html/showthread.php
490892 MyHome 20 0 138m 25m 7500 R 10.3 0.2 0:01.02 lsphp5:/home/MyHome/public_html/showthread.php
490885 MyHome 20 0 141m 28m 7500 R 10.0 0.2 0:01.09 lsphp5:/home/MyHome/public_html/showthread.php
490888 MyHome 20 0 138m 26m 7500 R 10.0 0.2 0:01.02 lsphp5:/home/MyHome/public_html/showthread.php
490889 MyHome 20 0 138m 26m 7500 R 10.0 0.2 0:01.03 lsphp5:/home/MyHome/public_html/showthread.php
490891 MyHome 20 0 141m 29m 7508 R 10.0 0.2 0:01.02 lsphp5:/home/MyHome/public_html/showthread.php
490893 MyHome 20 0 138m 25m 7500 R 10.0 0.2 0:01.00 lsphp5:/home/MyHome/public_html/showthread.php
490905 MyHome 20 0 138m 26m 7500 R 10.0 0.2 0:00.98 lsphp5:/home/MyHome/public_html/showthread.php
490906 MyHome 20 0 137m 24m 7500 R 10.0 0.2 0:00.95 lsphp5:/home/MyHome/public_html/showthread.php
490910 MyHome 20 0 145m 32m 7500 R 10.0 0.2 0:00.88 lsphp5:/home/MyHome/public_html/showthread.php
490664 MyHome 20 0 138m 26m 7416 R 5.0 0.2 0:00.15 lsphp5:/home/MyHome/public_html/showthread.php
490665 MyHome 20 0 138m 25m 7400 R 5.0 0.2 0:00.15 lsphp5:/home/MyHome/public_html/showthread.php
490668 MyHome 20 0 137m 25m 7368 R 4.3 0.2 0:00.13 lsphp5:/home/MyHome/public_html/showthread.php
490669 MyHome 20 0 137m 24m 7364 R 3.7 0.2 0:00.11 lsphp5:/home/MyHome/public_html/showthread.php
490670 MyHome 20 0 137m 24m 7364 R 3.3 0.2 0:00.10 lsphp5:/home/MyHome/public_html/showthread.php
490671 MyHome 20 0 137m 24m 7380 R 3.3 0.2 0:00.10 lsphp5:/home/MyHome/public_html/showthread.php
490672 MyHome 20 0 137m 24m 7380 R 3.0 0.2 0:00.09 lsphp5:/home/MyHome/public_html/showthread.php
490673 MyHome 20 0 136m 24m 7380 R 2.7 0.2 0:00.08 lsphp5:/home/MyHome/public_html/showthread.php
490674 MyHome 20 0 137m 24m 7364 R 2.7 0.2 0:00.08 lsphp5:/home/MyHome/public_html/showthread.php
490677 MyHome 20 0 136m 23m 7336 R 2.0 0.1 0:00.06 lsphp5:/home/MyHome/public_html/showthread.php
490676 MyHome 20 0 135m 22m 7208 R 1.7 0.1 0:00.05 lsphp5:/home/MyHome/public_html/showthread.php
490678 MyHome 20 0 135m 22m 7192 R 1.7 0.1 0:00.05 lsphp5:/home/MyHome/public_html/showthread.php
490679 MyHome 20 0 134m 21m 7152 R 1.3 0.1 0:00.04 lsphp5:/home/MyHome/public_html/showthread.php
490680 MyHome 20 0 128m 15m 6752 R 0.7 0.1 0:00.02 lsphp5:/home/MyHome/public_html/showthread.php
490681 MyHome 20 0 125m 11m 6304 R 0.3 0.1 0:00.01 lsphp5:/home/MyHome/public_html/showthread.php

Please help