Server load and reduction methods

How to check the server load and methods to reduce it?

Methods to check:

1) bash12:~$ w
 11:31:50 up  9:15,  8 users,  load average: 0.81, 0.90, 0.91

2) bash12:~$ top -c

Tasks: 144 total,   2 running, 141 sleeping,   0 stopped,   1 zombie
Cpu(s): 28.7%us,  3.0%sy,  0.0%ni, 68.3%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:    994376k total,   934952k used,    59424k free,    30228k buffers
Swap:  1389580k total,    22568k used,  1367012k free,   385788k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                  
 8835 hemanth.  20   0  411m 231m  31m R 24.2 23.9  35:23.63 /usr/local/firefox/firefox-bin                                                                           
 6486 root      20   0  117m  74m 9.9m S  5.6  7.6  24:29.87 /usr/X11R6/bin/X :0 -br -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7                           
 7037 hemanth.  20   0 40340  18m  10m S  1.3  1.9   0:47.87 gnome-terminal                                                                                           
10025 hemanth.  20   0  5480 2212 1644 R  1.0  0.2   0:00.08 top -c     

3) MySQL connections

root@host # mysqladmin proc

+----------+------------------+-----------+-------------------+----------------+------+--------------------+------------------+
| Id       | User             | Host      | db                | Command        | Time | State              | Info             |
+----------+------------------+-----------+-------------------+----------------+------+--------------------+------------------+
| 257799   | sgfishes_fishmar | localhost | sgfishes_fishmart | Sleep          | 0    |                    |                  |
| 34102304 | DELAYED          | localhost | technoph_sethwee  | Delayed insert | 3    | Waiting for INSERT |                  |
| 34104667 | technoph_sethwee | localhost | technoph_sethwee  | Sleep          | 2    |                    |                  |
| 34104674 | lancermo_vb      | localhost | lancermo_vb       | Sleep          | 0    |                    |                  |
| 34104675 | root             | localhost |                   | Query          | 0    |                    | show processlist |
+----------+------------------+-----------+-------------------+----------------+------+--------------------+------------------+

4) To check the http connections

root@host [/]# pidof httpd
30457 23992 23660 23659 23658 23657 23656 23655 10035 10028

5)  root@host [~]# uptime
 14:09:07 up 159 days, 23:39,  2 users,  load average: 0.30, 0.44, 0.44

Methods to reduce server load

1 )netstat -plan | grep :80 | awk '{print $5}' | cut -d: -f 1 | sort | uniq -c | sort -n
2) netstat -plan | grep :25 | awk '{print $5}' | cut -d: -f 1 | sort | uniq -c | sort -n
3) pstree -paul
4) cd /tmp
5) rm -f dos-* sess_* .spamassassin*
6) find . -user nobody -exec rm -f '{}' \;
7) ps -C exim -fH ewww
8) ps -C exim -fH eww |grep home
9) netstat -ntu | grep ':' | awk '{print $5}' | awk '{sub("::ffff:","");print}' | cut -f1 -d ':' | sort | uniq -c | sort -n
10) mysqladmin proc |grep Sleep |awk {'print $4'}|cut -d_ -f 1|sort|uniq -c|sort -nk 1
11) ps -C exim -fH ewww
12) for i in `ipcs -s | awk '{print $2}'`; do (ipcrm -s $i); done
13) for i in `mysqladmin proc |grep Sleep |cut -d " " -f 2`; do mysqladmin kill $i; done
14) exim -bp |grep "*** frozen ***" |awk '{print $3}' |xargs exim -Mrm
15) exiqgrep -z -i | xargs exim -Mrm;exiqgrep -o 432000 -i | xargs exim -Mrm