平武建站

mysql数据库环境优化

一、环境优化

1.1内存优化

由于数据库主机一般内存较大，因此采用huge page。而且尽量使用80%的内存，以空间换时间。

创新互联是创新、创意、研发型一体的综合型网站建设公司，自成立以来公司不断探索创新，始终坚持为客户提供满意周到的服务，在本地打下了良好的口碑，在过去的十余年时间我们累计服务了上千家以及全国政企客户，如成都加固等企业单位，完善的项目管理流程，严格把控项目进度与质量监控加上过硬的技术实力获得客户的一致表扬。

/etc/sysctl.conf配置参数：

vm.hugetlb_shm_group=3306

kernel.shmmax=243805679616

kernel.shmall=59522871

1.2虚拟内存优化

由于数据库对存取速度反应较大，因此关闭swap。

1.3网络优化

由于公司需要直接访问IDC机房中数据库，因此网络需要优化。

/etc/sysctl.conf配置参数：

net.core.somaxconn = 40000

net.ipv4.tcp_max_syn_backlog = 40000

net.ipv4.ip_local_port_range = 1024 65535

net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_tw_recycle = 1

net.core.wmem_max=12582912

net.core.rmem_max=12582912

net.ipv4.tcp_rmem= 10240 87380 12582912

net.ipv4.tcp_wmem= 10240 87380 12582912

net.ipv4.tcp_window_scaling = 1

net.ipv4.tcp_timestamps = 1

net.ipv4.tcp_sack = 1

net.ipv4.tcp_no_metrics_save = 1

net.core.netdev_max_backlog = 5000

1.4IO优化

尽量减少对IO的限制。因此在保障硬盘读写正常的情况下，需要增加如下/etc/sysctl.conf参数：

fs.file-max = 1000000

/etc/security/limits.conf配置：

*                soft  nofile                  65535

*                hard    nofile           65535

MySQL   hard   memlock  unlimited

mysql   soft    memlock  unlimited

二、数据库优化

2.1源码编译优化

采用较优的编译参数：

-m64 -Ofast -flto -march=native -funroll-loops -mfpmath=sse -static -g

编译命令：

cmake .. -DCMAKE_CXX_FLAGS_DEBUG=="-DUNIV_DEBUG -DUNIV_SYNC_DEBUG" \

-DCMAKE_BUILD_TYPE=RelWithDebInfo \

-DCMAKE_C_FLAGS_RELWITHDEBINFO="-m64 -Ofast -flto -march=native -funroll-loops -mfpmath=sse -static -g" \

-DCMAKE_CXX_FLAGS_RELWITHDEBINFO="-m64 -Ofast -flto -march=native -funroll-loops -mfpmath=sse -static -g" \

-DBUILD_CONFIG=mysql_release \

-DFEATURE_SET=community \

-DWITH_EMBEDDED_SERVER=ON \

-DCMAKE_INSTALL_PREFIX=/usr/local/percona \

-DMYSQL_UNIX_ADDR=/tmp/mysql.sock \

-DMYSQL_DATADIR=/data/mysql/data \

-DSYSCONFDIR=/etc \

-DMYSQL_TCP_PORT=3306 \

-DWITH_ARCHIVE_STORAGE_ENGINE=1 \

-DWITH_BLACKHOLE_STORAGE_ENGINE=1 \

-DWITH_FEDERATED_STORAGE_ENGINE=1  \

-DWITH_MYISAM_STORAGE_ENGINE=1 \

-DWITH_PARTITION_STORAGE_ENGINE=1 \

-DWITH_PERFSCHEMA_STORAGE_ENGINE=1 \

-DWITH_READLINE=system \

-DENABLED_LOCAL_INFILE=1 \

-DDEFAULT_CHARSET=utf8 \

-DDEFAULT_COLLATION=utf8_general_ci \

-DWITH_EXTRA_CHARSETS=all \

-DWITH_FAST_MUTEXES=ON\

-DWITH_ATOMIC_LOCKS=rwlocks

2.2内存优化

尽量采用内存的80%，作为数据库内存空间。

配置参数：

innodb_buffer_pool_size=180G

join_buffer_size=32M

key_buffer_size=256M

read_buffer_size=8388608

read_rnd_buffer_size=4M

2.3连接池优化

采用连接池，以负载高并发的访问。

配置参数：

thread_handling=pool-of-threads

thread_pool_high_prio_mode=statements

thread_pool_max_threads=100000

thread_pool_size=48

thread_pool_oversubscribe=10

thread_pool_stall_limit=300

2.4IO优化

配置参数：

sync_binlog=1000

innodb_read_io_threads=48

innodb_thread_concurrency=0

innodb_use_native_aio=1

innodb_write_io_threads=48

innodb_flush_method=ALL_O_DIRECT

2.5网络优化

配置参数：

max_connections=1000

net_buffer_length=1M

2.6结构优化

对一些大表进行分区处理，如crm_consume、crm_consume_detail、crm_customer等，以优化查询。

2.7综合优化

/etc/my.cnf配置参数：

[mysqld]

audit_log_rotations=5

audit_log_rotate_on_size=20480000

slow_query_log=1

slow_query_log_file=/data/mysql/data/db4-slow.log

long_query_time=5

back_log=1024

big_tables=1

bind_address=0.0.0.0

binlog_cache_size=8M

binlog_format=row

basedir=/usr/local/percona

binlog_stmt_cache_size=8M

datadir=/data/mysql/data/

delayed_queue_size=10000

enforce-gtid-consistency=ON

default_time_zone=+8:00

event_scheduler=1

expire_logs_days=7

federated

gtid_mode=ON

innodb_additional_mem_pool_size=64M

innodb_buffer_pool_instances=16

metadata_locks_hash_instances=16

table_open_cache_instances=16

innodb_buffer_pool_size=180G

innodb_data_file_path=ibdata1:1024M:autoextend

innodb_data_home_dir=/data/mysql/data/

innodb_file_per_table=1

innodb_flush_log_at_trx_commit=2

innodb_autoinc_lock_mode=2

innodb_flush_method=ALL_O_DIRECT

innodb_flush_neighbors=0

innodb_io_capacity=1000

innodb_lock_wait_timeout=50

innodb_log_buffer_size=512M

innodb_log_file_size=4096M

innodb_log_files_in_group=3

innodb_log_group_home_dir=/data/mysql/data/

innodb_max_dirty_pages_pct=75

innodb_old_blocks_pct=30

innodb_old_blocks_time=1000

innodb_open_files=4096

innodb_purge_threads=1

innodb_random_read_ahead=1

innodb_read_io_threads=48

innodb_thread_concurrency=0

innodb_use_native_aio=1

innodb_write_io_threads=48

join_buffer_size=32M

key_buffer_size=256M

log-bin=mysql-bin

log-error=/var/log/mysql-error.log

log_output=FILE

log_slave_updates=1

max_allowed_packet=128M

max_connect_errors=10000000

max_connections=1000

max_heap_table_size=64M

max_tmp_tables=1024

myisam_recover=FORCE,BACKUP

myisam_sort_buffer_size=128M

net_buffer_length=1M

open_files_limit=65535

pid-file=/data/mysql/data/mysql.pid

port=3306

query_cache_size=0

query_cache_type=0

report_host=192.168.201.11

report_port=3306

read_buffer_size=8388608

read_rnd_buffer_size=4M

relay-log=mysql-relay-bin

log_warnings=9

sync_binlog=1000

rpl_semi_sync_master_enabled=1

rpl_semi_sync_master_timeout=1000

server-id=11

skip-external-locking

skip-name-resolve

socket=/tmp/mysql.sock

sort_buffer_size=16M

table_definition_cache=4096

transaction_isolation=read-committed

table_open_cache=16384

thread_cache_size=2048

thread_stack=1048576

tmp_table_size=64M

slave_net_timeout=30

master-info-repository=TABLE

relay-log-info-repository=TABLE

sync-master-info=1

slave-parallel-workers=4

binlog-checksum=CRC32

master-verify-checksum=1

slave-sql-verify-checksum=1

binlog-rows-query-log_events=1

thread_handling=pool-of-threads

thread_pool_high_prio_mode=statements

thread_pool_max_threads=100000

thread_pool_size=48

thread_pool_oversubscribe=10

thread_pool_stall_limit=300

innodb_monitor_enable = '%'

performance_schema = ON

performance_schema_instrument = '%=on'

三、性能测试

3.1基准测试

利用sysbench工具进行数据库oltp测试，得出测试结论如下：

OLTP test statistics:

queries performed:

read:                            481348

write:                           137528

other:                           68764

total:                           687640

transactions:                        34382  (572.21 per sec.)

read/write requests:                 618876 (10299.77 per sec.)

other operations:                    68764  (1144.42 per sec.)

ignored errors:                      0      (0.00 per sec.)

reconnects:                          0      (0.00 per sec.)

General statistics:

total time:                          60.0864s

total number of events:              34382

total time taken by event execution: 3842.8699s

response time:

min:                                 23.10ms

avg:                                111.77ms

max:                                323.79ms

approx.  95 percentile:             166.95ms

Threads fairness:

events (avg/stddev):           537.2188/9.58

execution time (avg/stddev):   60.0448/0.02

可知：

tps：572.21 per sec

qps：10299.77 per sec.

3.2优化后测试

最好的测试结论如下：

OLTP test statistics:

queries performed:

read:                            7265944

write:                           2075984

other:                           1037992

total:                           10379920

transactions:                        518996 (864.91 per sec.)

read/write requests:                 9341928 (15568.43 per sec.)

other operations:                    1037992 (1729.83 per sec.)

ignored errors:                      0      (0.00 per sec.)

reconnects:                          0      (0.00 per sec.)

General statistics:

total time:                          600.0560s

total number of events:              518996

total time taken by event execution: 38354.8485s

response time:

min:                                  6.49ms

avg:                                 73.90ms

max:                                252.93ms

approx.  95 percentile:             118.04ms

Threads fairness:

events (avg/stddev):           8109.3125/1090.72

execution time (avg/stddev):   599.2945/0.45

可知：

tps：864.91 per sec

qps：15568.43 per sec

3.3SQL测试

采用单个SQL语句进行测试，性能也有很大的提升。


当前名称：mysql数据库环境优化
本文网址：http://pwwzsj.com/article/gecshj.html

其他资讯