高Mysql的負載 - CPU 360％

具有：i高的MySQL CPU使用率，在服務器上英特爾（R）至強（R）CPU E5520 @ 2.27GHz處理器核心16和在CentOS運行16 GB RAM 5.4高Mysql的負載 - CPU 360％

的平均負載服務器500 - 900，這是真正高的數字

這裏是一些信息來幫助我們

MySQL的配置文件/etc/my.cnf

[mysqld] 
local-infile=0 
safe-show-database 
skip-locking 
skip-innodb 
skip-networking 
old_passwords 
back_log = 50 
skip-innodb 
max_connections = 40000 
key_buffer_size = 640M 
myisam_sort_buffer_size = 256M 
myisam_max_sort_file_size = 2048M 
join_buffer_size = 3M 
read_buffer_size = 3M 
sort_buffer_size = 3M 
table_cache = 8000 
thread_cache_size = 1024 
wait_timeout = 300 
interactive_timeout = 600 
connect_timeout = 10 
tmp_table_size = 1024M 
max_heap_table_size = 1024M 
max_allowed_packet = 128M 
net_buffer_length = 16384 
max_connect_errors = 100000 
long_query_time=0 
thread_concurrency = 32 
concurrent_insert = 2 
table_lock_wait_timeout = 30 
read_rnd_buffer_size = 4M 
bulk_insert_buffer_size = 16M 
query_cache_limit = 4M 
query_cache_size = 128M 
query_cache_type = 1 
query_prealloc_size = 262144 
query_alloc_block_size = 65536 
range_alloc_block_size = 4096 
transaction_alloc_block_size = 8192 
transaction_prealloc_size = 4096 
default-storage-engine = MyISAM 
max_write_lock_count = 8 
tmpdir=/mysqltmp 
set-variable=long_query_time=1 
log-slow-queries=/var/log/mysql/log-slow-queries.log 

[mysqld_safe] 
log-error=/var/log/mysqld.log 
pid-file=/var/run/mysqld/mysqld.pid 
nice = -10 
open_files_limit = 8192 

[mysqldump] 
quick 
max_allowed_packet = 128M 

[myisamchk] 
key_buffer_size = 640M 
sort_buffer_size = 64M 
read_buffer_size = 16M 
write_buffer_size = 16M 

[mysqlhotcopy] 
interactive-timeout

===============註釋我刪除了一些查詢，因爲我不能在這裏發佈超過30000個字符==================== =================

SHOW FULL PROCESSLIST; 
    393786 site_dtl localhost site_dtl Query 1 Locked UPDATE dle_post SET news_read = news_read +1 WHERE id = '3657' 
    402437 root localhost None Sleep 496 --- --- 
    409374 root localhost None Sleep 180 --- --- 
    411150 tgofmovi_home localhost tgofmovi_home Sleep 40 --- --- 
    411230 tgofmovi_home localhost tgofmovi_home Sleep 36 --- --- 
    411401 site_dtl localhost site_dtl Query 1 Locked SELECT * 
    FROM dle_post 
    WHERE approve = '1' 
    AND category 
    IN (80) 
    ORDER BY date DESC 
    LIMIT 0 , 10 
    411410 site_dtl localhost site_dtl Query 0 Locked SELECT * 
    FROM dle_post 
    WHERE approve = '1' 
    AND category 
    IN (80) 
    ORDER BY date DESC 
    LIMIT 0 , 10 
    411430 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(1,2,7,6,8) AND id NOT IN (0) AND date >= ' 
    411433 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411439 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411443 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411444 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411490 site_dtl localhost site_dtl Query 2 Sorting result SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411491 site_dtl localhost site_dtl Query 2 Sorting result SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411498 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411509 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411511 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411512 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411513 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411514 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411515 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411526 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411527 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE 
    411541 site_dtl localhost site_dtl Query 2 Sorting result SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411543 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(1,2,7,6,8) AND id NOT IN (0) AND date >= ' 
    411544 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(1,2,7,6,8) AND id NOT IN (0) AND date >= ' 
    411545 site_dtl localhost site_dtl Query 2 Sorting result SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411547 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(1,2,7,6,8) AND id NOT IN (0) AND date >= ' 
    411548 site_dtl localhost site_dtl Query 2 Sorting result SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411549 site_dtl localhost site_dtl Query 2 Sorting result SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411565 site_dtl localhost site_dtl Query 2 Sorting result SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411618 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411619 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(80) ORDER BY date DESC LIMIT 0,10 
    411620 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411621 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411622 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411623 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411624 site_dtl localhost site_dtl Query 0 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411625 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(91) AND id NOT IN (0) AND date >= '2010-11 
    411796 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411797 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37,43,54,55,56,60,61,62,63,64,69,70,71,46,5 
    411798 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37,43,54,55,56,60,61,62,63,64,69,70,71,46,5 
    411800 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411801 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411802 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411803 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411804 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411807 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411808 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411809 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411811 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411812 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411813 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411814 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411818 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411819 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411820 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411821 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411822 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411823 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411825 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411826 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411827 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411828 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411829 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(65) AND id NOT IN (0) AND date >= '2010-11 
    411830 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411831 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411833 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411834 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(48) AND id NOT IN (0) AND date >= '2010-11 
    411836 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411837 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411838 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411841 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411842 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411843 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411845 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411855 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411856 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' AND date >= '2010- 
    411857 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411858 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411859 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411860 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411861 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411862 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411863 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411864 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411865 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411866 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411867 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411868 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(37) AND id NOT IN (0) AND date >= '2010-11 
    411869 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411870 site_dtl localhost site_dtl Query 1 Sending data SELECT COUNT(*) as count FROM dle_post WHERE category regexp '[[:<:]](81)[[:>:]]' AND approve AND da 
    411871 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411872 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411873 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411874 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411875 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411876 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411877 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411878 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411879 site_dtl localhost site_dtl Query 1 Sending data SELECT COUNT(*) as count FROM dle_post WHERE category regexp '[[:<:]](44|80|81|54|55|60|61|62|63|64| 
    411890 site_dtl localhost site_dtl Query 1 Sending data SELECT COUNT(*) as count FROM dle_post WHERE category regexp '[[:<:]](44|80|81|54|55|60|61|62|63|64| 
    411891 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' AND date >= '2010- 
    411892 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411893 site_dtl localhost site_dtl Query 1 Copying to tmp table SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY RAND() LIM 
    411894 site_dtl localhost site_dtl Query 1 Sending data SELECT COUNT(*) as count FROM dle_post WHERE category regexp '[[:<:]](44|80|81|54|55|60|61|62|63|64| 
    411895 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411896 site_dtl localhost site_dtl Query 1 Sending data SELECT COUNT(*) as count FROM dle_post WHERE category regexp '[[:<:]](36|37|43|44|80|81|54|55|60|61| 
    411897 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411898 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411899 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411900 site_dtl localhost site_dtl Query 1 Locked SELECT * FROM dle_post WHERE approve='1' AND category IN(44,54,55,56,60,61,62,63,64,69,70,71) AND id 
    411901 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411902 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411903 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411904 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411905 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411907 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411908 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, autor, date, short_story, SUBSTRING(full_story, 1, 15) as full_story, xfields, title, cat 
    411909 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411910 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411911 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411912 site_dtl localhost site_dtl Query 1 Locked SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411919 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411921 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411922 site_dtl localhost site_dtl Query 2 Sorting result SELECT id, title, date, alt_name, category, flag FROM dle_post WHERE approve='1' ORDER BY date DESC 
    411950 root localhost mysql Query 0 --- SHOW PROCESSLIST

========================= ===========================

SHOW CREATE TABLE dle_post\G 
*************************** 1. row *************************** 
Table: dle_post 
Create Table: CREATE TABLE `dle_post` (
`id` int(11) NOT NULL auto_increment, 
`autor` varchar(40) NOT NULL default '', 
`date` datetime NOT NULL default '0000-00-00 00:00:00', 
`short_story` text NOT NULL, 
`full_story` text NOT NULL, 
`xfields` text NOT NULL, 
`title` varchar(255) NOT NULL default '', 
`descr` varchar(200) NOT NULL default '', 
`keywords` text NOT NULL, 
`category` varchar(200) NOT NULL default '0', 
`alt_name` varchar(200) NOT NULL default '', 
`comm_num` smallint(5) unsigned NOT NULL default '0', 
`allow_comm` tinyint(1) NOT NULL default '1', 
`allow_main` tinyint(1) unsigned NOT NULL default '1', 
`allow_rate` tinyint(1) unsigned NOT NULL default '1', 
`approve` tinyint(1) NOT NULL default '0', 
`fixed` tinyint(1) NOT NULL default '0', 
`rating` smallint(5) NOT NULL default '0', 
`allow_br` tinyint(1) NOT NULL default '1', 
`vote_num` smallint(5) unsigned NOT NULL default '0', 
`news_read` mediumint(8) NOT NULL default '0', 
`votes` tinyint(1) NOT NULL default '0', 
`access` varchar(150) NOT NULL default '', 
`symbol` char(3) NOT NULL default '', 
`flag` tinyint(1) NOT NULL default '0', 
`editdate` varchar(15) NOT NULL default '', 
`editor` varchar(40) NOT NULL default '', 
`reason` varchar(255) NOT NULL default '', 
`view_edit` tinyint(1) NOT NULL default '0', 
`tags` varchar(255) NOT NULL default '', 
`metatitle` varchar(255) NOT NULL default '', 
PRIMARY KEY (`id`), 
KEY `autor` (`autor`), 
KEY `alt_name` (`alt_name`), 
KEY `category` (`category`), 
KEY `approve` (`approve`), 
KEY `allow_main` (`allow_main`), 
KEY `date` (`date`), 
KEY `symbol` (`symbol`), 
KEY `comm_num` (`comm_num`), 
KEY `tags` (`tags`), 
FULLTEXT KEY `short_story` (`short_story`,`full_story`,`xfields`,`title`) 
) ENGINE=MyISAM AUTO_INCREMENT=5265 DEFAULT CHARSET=utf8 

1 row in set (0.03 sec)

================ ====================================

SHOW TABLE STATUS LIKE 'dle_post'\G 
*************************** 1. row *************************** 
Name: dle_post 
Engine: MyISAM 
Version: 10 
Row_format: Dynamic 
Rows: 4971 
Avg_row_length: 6685 
Data_length: 33232848 
Max_data_length: 281474976710655 
Index_length: 7998464 
Data_free: 0 
Auto_increment: 5266 
Create_time: 2010-04-01 15:21:19 
Update_time: 2010-11-14 19:24:19 
Check_time: 2010-06-20 01:32:40 
Collation: utf8_general_ci 
Checksum: NULL 
Create_options: 
Comment: 
1 row in set (0.00 sec)

======= =============================================

SHOW TABLE STATUS LIKE 'dle_post'\G 
*************************** 1. row *************************** 
id: 1 
select_type: SIMPLE 
table: NULL 
type: NULL 
possible_keys: NULL 
key: NULL 
key_len: NULL 
ref: NULL 
rows: NULL 
Extra: No tables used 
1 row in set (0.00 sec)

=========================================== =========

SHOW VARIABLES LIKE '%buffer%'; 
+-------------------------------+-----------+ 
| Variable_name | Value | 
+-------------------------------+-----------+ 
| bulk_insert_buffer_size | 16777216 | 
| innodb_buffer_pool_awe_mem_mb | 0 | 
| innodb_buffer_pool_size | 8388608 | 
| innodb_log_buffer_size | 1048576 | 
| join_buffer_size | 3145728 | 
| key_buffer_size | 671088640 | 
| myisam_sort_buffer_size | 268435456 | 
| net_buffer_length | 16384 | 
| preload_buffer_size | 32768 | 
| read_buffer_size | 3145728 | 
| read_rnd_buffer_size | 4194304 | 
| sort_buffer_size | 3145728 | 
+-------------------------------+-----------+ 
12 rows in set (0.00 sec)

================================== ==================

我希望這些信息都需要解決這個問題

注意：此命令已被執行時，服務器負載180 - 350

謝謝

來源

2010-11-15 iLinux85

沒有看你的整個帖子，你是基於你的服務器負載數字？ – 2010-11-15 11:24:33

你有慢查詢日誌？也發佈EXPLAIN語句。

您的ORDER BY RAND()對於大表格會很慢，有更好的方法，比如this example。基本上你只需要生成一個介於0和MAX之間的隨機數（PRIMARY_KEY），然後執行SELECT * from table WHERE PRIMARY_KEY > @that_random_number LIMIT 1。

因此，而不是SELECT * from dle_post ORDER BY RAND（）LIMIT 1;

這樣做：

計算你的主鍵（AUTO_INCREMENT）的最大值，其存儲在一個變量。

SELECT MAX（PRIMARY_ID_COLUMN_NAME）FROM dle_posts LIMIT 1;
生成一個隨機數（在您的應用程序中最好避免數據庫往返時間，儘管您可以通過將FLOOR(RAND() * MAX);替換爲MAX來在步驟1中合併此數字。但在PHP的例子：

$ selected = rand（0，$ max）;
現在與主鍵等於或大於這個值獲得的第一行：

SELECT * FROM dle_posts WHERE PRIMARY_ID_COLUMN_NAME> $選擇LIMIT 1

是否對(approve, category, date)幫助的索引？

您緩慢的查詢日誌顯示沒有大問題。如果你可以修改源代碼，你可以重寫以下查詢：

SELECT COUNT(*) as count FROM dle_users where FROM_UNIXTIME(reg_date) > NOW() - INTERVAL 1 HOUR;

的查詢，你現在不使用，但有你的應用程序填寫時間戳。現在查詢緩存可以實際緩存查詢。

來源

2010-11-15 11:34:30 Konerak

同意 - 蘭特（）命令將會殺死性能;你應該擺脫它。但是請注意：如果您的主鍵序列中存在任何空白，則建議的解決方案會給出傾斜的隨機性。 – Spudley 2010-11-15 12:54:22

@Spudley：關於傾斜的好處，我必須牢記這一點。 – Konerak 2010-11-15 13:05:42

雖然它非常快，但是如果你有一個扁平的ID序列或者你可以忍受歪斜，那麼它可能是從表中隨機輸入的最佳解決方案。 – Spudley 2010-11-15 13:09:32

高Mysql的負載 - CPU 360％

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