mysql innoDB性能
[英]mysql innoDB Performance
问题描述
I have some trouble with my mySQL innoDB Engine.. 
我的mySQL innoDB Engine出现问题。
SQL Statements like "select * from posts" takes a long time. 诸如“从帖子中选择*”之类的SQL语句需要很长时间。
This is my MySQL Config: 这是我的MySQL配置：
[mysql]
# CLIENT #
port = 3306
socket = /var/lib/mysqld/mysqld.sock
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
# GENERAL #
user = mysql
#default_storage_engine = InnoDB
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
bind-address = 127.0.0.1
# MyISAM #
key_buffer_size = 32M
myisam_recover = FORCE,BACKUP
# SAFETY #
max_allowed_packet = 16M
max_connect_errors = 1000000
# DATA STORAGE #
datadir = /var/lib/mysql/
# BINARY LOGGING #
log_bin = /var/lib/mysql/mysql-bin
expire_logs_days = 14
sync_binlog = 1
# CACHES AND LIMITS #
tmp_table_size = 64M
max_heap_table_size = 64M
query_cache_type = 0
query_cache_size = 0
max_connections = 500
thread_cache_size = 50
open_files_limit = 65535
table_definition_cache = 1024
table_open_cache = 2048
read_rnd_buffer_size = 1M
query_cache_type = 1
# INNODB #
innodb_flush_method = O_DIRECT
innodb_log_files_in_group = 2
innodb_log_file_size = 256M
innodb_flush_log_at_trx_commit = 1
innodb_file_per_table = 1
innodb_buffer_pool_size = 4G
# LOGGING #
log_error = /var/lib/mysql/mysql-error.log
log_queries_not_using_indexes = 1
slow_query_log = 1
slow_query_log_file = /var/lib/mysql/mysql-slow.log
While a sql statement is running i got an load avg ~2.0 当一个sql语句运行时，我得到一个平均负载〜2.0
the assigned cores are mostly 0.0 % usage.. 分配的核心大部分是0.0％的使用
iostat tell me: iostat告诉我：
avg-cpu: %user %nice %system %iowait %steal %idle
0.39 0.00 0.26 5.15 0.04 94.16
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
xvdap2 152.80 139.39 5550.51 567593 22601276
xvdap1 0.04 0.21 0.00 836 0
Any ideas for pushing up the performance? 有什么想法可以提高性能吗？
Hardware (XEN guest)
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 30
model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
stepping : 5
cpu MHz : 2527.052
cache size : 8192 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
bogomips : 5054.10
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 30
model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
stepping : 5
cpu MHz : 2527.052
cache size : 8192 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
bogomips : 5054.10
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 30
model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
stepping : 5
cpu MHz : 2527.052
cache size : 8192 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
bogomips : 5054.10
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 30
model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
stepping : 5
cpu MHz : 2527.052
cache size : 8192 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
bogomips : 5054.10
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 4
vendor_id : GenuineIntel
cpu family : 6
model : 30
model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
stepping : 5
cpu MHz : 2527.052
cache size : 8192 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
bogomips : 5054.10
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 5
vendor_id : GenuineIntel
cpu family : 6
model : 30
model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
stepping : 5
cpu MHz : 2527.052
cache size : 8192 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
bogomips : 5054.10
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 6
vendor_id : GenuineIntel
cpu family : 6
model : 30
model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
stepping : 5
cpu MHz : 2527.052
cache size : 8192 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu de tsc msr pae cx8 sep cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good aperfmperf pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
bogomips : 5054.10
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
Meminfo 记忆信息
MemTotal: 6146908 kB
MemFree: 2231936 kB
Buffers: 45436 kB
Cached: 2542340 kB
SwapCached: 0 kB
Active: 2629024 kB
Inactive: 915652 kB
Active(anon): 956724 kB
Inactive(anon): 46272 kB
Active(file): 1672300 kB
Inactive(file): 869380 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 2097144 kB
SwapFree: 2097144 kB
Dirty: 972812 kB
Writeback: 1412 kB
AnonPages: 956912 kB
Mapped: 18048 kB
Shmem: 46104 kB
Slab: 144676 kB
SReclaimable: 137764 kB
SUnreclaim: 6912 kB
KernelStack: 1136 kB
PageTables: 7524 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 5170596 kB
Committed_AS: 4964188 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 26032 kB
VmallocChunk: 34359711292 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 6156288 kB
DirectMap2M: 0 kB
An example schema: 模式示例：
CREATE TABLE IF NOT EXISTS Produkte` (
id int(11) NOT NULL AUTO_INCREMENT,
uniqueID varchar(50) CHARACTER SET latin1 NOT NULL,
Link varchar(255) CHARACTER SET latin1 NOT NULL,
Title varchar(1000) CHARACTER SET latin1 NOT NULL,
foundTime varchar(100) CHARACTER SET latin1 NOT NULL,
Desc text CHARACTER SET latin1 NOT NULL,
Rank int(11) NOT NULL DEFAULT '10000000',
PRIMARY KEY (id),
UNIQUE KEY uniqueID (uniqueID)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC AUTO_INCREMENT=9407809 ;
1 个解决方案
解决方案1
0 2013-08-13 09:46:19
Try change innodb_flush_log_at_trx_commit to 2. From documentation : 尝试将innodb_flush_log_at_trx_commit更改为2。从文档开始 ：
You can achieve better performance by setting the value different from 1, but then you can lose up to one second worth of transactions in a crash. 您可以通过将值设置为1来获得更好的性能，但是在崩溃中您可能会损失高达一秒钟的事务价值。
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