What should i do if I want to prevent this high load.
My website becomes slow when load is higher than 8.
Please see iotop result too.
top - 20:23:10 up 127 days, 3:22, 1 user, load average: 9.92, 9.87, 9.81 Tasks: 1031 total, 3 running, 1027 sleeping, 0 stopped, 1 zombie Cpu(s): 14.7%us, 0.7%sy, 0.1%ni, 79.6%id, 4.7%wa, 0.0%hi, 0.2%si, 0.0%st Mem: 16413676k total, 16312548k used, 101128k free, 110836k buffers Swap: 10190840k total, 3182468k used, 7008372k free, 2033604k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2776 mysql 15 0 14.6g 10g 5220 S 405.7 67.4 21710:40 mysqld 6201 apache 15 0 369m 16m 5356 S 3.7 0.1 0:00.40 httpd 8447 apache 15 0 368m 15m 5364 S 3.7 0.1 0:00.27 httpd 10807 apache 16 0 368m 14m 4640 S 3.7 0.1 0:00.04 httpd 11074 root 15 0 11548 1668 676 R 3.7 0.0 0:00.04 top 2088 apache 15 0 368m 15m 5972 S 1.8 0.1 0:00.93 httpd 2737 root 15 0 3824 392 336 S 1.8 0.0 433:37.40 klogd 6879 apache 15 0 367m 15m 5652 S 1.8 0.1 0:00.39 httpd 8457 apache 15 0 367m 15m 5744 S 1.8 0.1 0:00.54 httpd 8866 apache 15 0 369m 15m 4832 S 1.8 0.1 0:00.18 httpd 9147 apache 15 0 368m 14m 4960 S 1.8 0.1 0:00.15 httpd 9884 apache 16 0 368m 16m 6508 S 1.8 0.1 0:03.97 httpd 10583 apache 16 0 368m 15m 5148 S 1.8 0.1 0:00.10 httpd 10731 apache 15 0 367m 13m 3484 S 1.8 0.1 0:00.16 httpd 10782 apache 16 0 367m 12m 3544 S 1.8 0.1 0:00.04 httpd 14618 apache 15 0 367m 16m 6736 S 1.8 0.1 0:03.24 httpd 18697 apache 15 0 368m 16m 6744 S 1.8 0.1 0:02.47 httpd
vmstat procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 2 1 3182636 468436 111776 2012016 0 0 94 274 0 0 15 1 80 5 0
iostat Linux 2.6.18-274.12.1.el5 () 12/31/2012 avg-cpu: %user %nice %system %iowait %steal %idle 14.66 0.12 0.93 4.73 0.00 79.56 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sda 122.97 1504.32 4383.82 16525670026 48158254126 sda1 0.00 0.04 0.00 435456 230 sda2 122.97 1504.28 4383.82 16525231218 48158253896 dm-0 570.94 1502.31 4381.94 16503546226 48137527328 dm-1 0.48 1.97 1.89 21684608 20727136
io top Total DISK READ: 126.48 K/s | Total DISK WRITE: 6.79 M/s (is'nt this too high?) TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 15610 be/4 mysql 0.00 B/s 0.00 B/s 99.99 % 25.76 % mysqld --basedi~mysql/mysql.sock 15622 be/4 mysql 0.00 B/s 0.00 B/s -7.28 % 24.92 % mysqld --basedi~mysql/mysql.sock 3659 be/4 mysql 7.44 K/s 5.88 M/s 0.00 % 13.71 % mysqld --basedi~mysql/mysql.sock 2822 be/4 mysql 0.00 B/s 0.00 B/s 2.88 % 10.22 % mysqld --basedi~mysql/mysql.sock 2819 be/4 mysql 0.00 B/s 0.00 B/s 0.00 % 9.71 % mysqld --basedi~mysql/mysql.sock 15635 be/4 mysql 0.00 B/s 0.00 B/s -3.72 % 8.09 % mysqld --basedi~mysql/mysql.sock 15629 be/4 mysql 0.00 B/s 0.00 B/s -2.42 % 5.58 % mysqld --basedi~mysql/mysql.sock 801 be/3 root 0.00 B/s 208.31 K/s 0.00 % 3.97 % [kjournald] 2842 be/4 root 0.00 B/s 0.00 B/s 8.09 % 3.81 % irqbalance 2820 be/4 mysql 0.00 B/s 0.00 B/s 0.00 % 2.88 % mysqld --basedi~mysql/mysql.sock 7001 be/4 apache 0.00 B/s 0.00 B/s 0.00 % 2.70 % httpd 15636 be/4 mysql 0.00 B/s 0.00 B/s 10.32 % 2.51 % mysqld --basedi~mysql/mysql.sock 8034 be/4 apache 0.00 B/s 0.00 B/s 0.00 % 2.42 % httpd 2140 be/4 apache 0.00 B/s 0.00 B/s 0.00 % 2.32 % httpd