Mat*_*Suo 8 mysql innodb performance
我在我的服务器中运行了一个非常简单的查询“ select * from ap_statistic ”。服务器具有相同的硬件和软件配置（CPU 8 核，内存：32G，操作系统：redhat 5.5，mysql 版本：5.1）并运行相同的应用程序。在服务器A中，表ap_statistic的行号约为22512379，在服务器B中，表的行号为41438751。当然在服务器A上运行的查询比服务器B更快，但奇怪的是查询服务器 B 非常慢，需要 3 个多小时，而在服务器 A 中只需要 10 分钟。
我使用一些工具监控系统状态，发现在服务器A运行查询时，系统IO读取速度约为20~30M/s，而在服务器B为2~3M/s。我尝试清理 linux 缓存并重新启动 mysql 服务器，结果都是一样的。而且我尝试将DB从服务器B恢复到服务器A，所以服务器A中的查询非常非常慢，io读取速度非常慢。我想知道为什么会这样？ 服务器A的ap_statistic表数据是正常运行生成的，服务器B的表数据是存储过程生成的。表方案是：CREATE TABLE `ap_statistic` (
`ap_statisticId` BIGINT(20) UNSIGNED NOT NULL,
`deviceId` INT(11) UNSIGNED NOT NULL DEFAULT '0',
`macaddress` VARCHAR(100) DEFAULT NULL,
`check_time` TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00',
`ap_count` INT(10) UNSIGNED NOT NULL DEFAULT '0',
`wlan` VARCHAR(64) DEFAULT NULL,
`radio` VARCHAR(50) DEFAULT NULL,
`bssid` VARCHAR(32) DEFAULT NULL,
`zd_ap_name` VARCHAR(64) DEFAULT NULL,
`channel` INT(2) DEFAULT NULL,
`uplinkRSSI` INT(3) DEFAULT '0',
`downlinkRSSI` INT(3) DEFAULT '0',
`txBytes` BIGINT(20) DEFAULT '0',
`rxBytes` BIGINT(20) DEFAULT '0',
`txPkts` BIGINT(20) DEFAULT '0',
`rxPkts` BIGINT(20) DEFAULT '0',
`hops` INT(1) DEFAULT '0',
`numDownlink` INT(3) DEFAULT '0',
`distance` INT(4) DEFAULT '0',
`phyerr` INT(11) DEFAULT '0',
`max_num_clients` INT(3) DEFAULT '0',
`max_mesh_downlinks` INT(1) DEFAULT '0',
`airtime` INT(3) DEFAULT '0',
`uptimePercentage` INT(3) DEFAULT '0',
`total_num_clients` INT(3) DEFAULT '0',
`tx_actual_throughput` BIGINT(20) DEFAULT '0',
`rx_actual_throughput` BIGINT(20) DEFAULT '0',
`tunnelMode` VARCHAR(32) DEFAULT NULL,
`externalIp` VARCHAR(64) DEFAULT NULL,
`externalPort` VARCHAR(32) DEFAULT NULL,
`level` INT(1) DEFAULT '1'
`essid` VARCHAR(64) DEFAULT NULL,
`total_client_join` INT(11) DEFAULT '0',
PRIMARY KEY (`ap_statisticId`),
KEY `check_time` (`check_time`),
KEY `macaddress` (`macaddress`),
KEY `deviceId` (`deviceId`)
) ENGINE=INNODB DEFAULT CHARSET=utf8
以下是表文件信息和监控工具的一些输出
服务器B
-rw-rw---- 1 mysql mysql 18568183808 Oct 11 14:52 ap_statistic.ibd
[root@localhost itms]# filefrag ./ap_statistic.ibd
./ap_statistic.ibd: 164 extents found, perfection would be 159 extents
TABLE Non_unique Key_name Seq_in_index Column_name COLLATION Cardinality Sub_part Packed NULL Index_type COMMENT
------------ ---------- ---------- ------------ -------------- --------- ----------- -------- ------ ------ ---------- -------
ap_statistic 0 PRIMARY 1 ap_statisticId A 41438751 (NULL) (NULL) BTREE
ap_statistic 1 check_time 1 check_time A 10320 (NULL) (NULL) BTREE
ap_statistic 1 macaddress 1 macaddress A 16 (NULL) (NULL) YES BTREE
ap_statistic 1 deviceId 1 deviceId A 16 (NULL) (NULL) BTREE
mysql>show status;
Variable_name Value
Aborted_clients 0
Aborted_connects 0
Binlog_cache_disk_use 0
Binlog_cache_use 0
Bytes_received 1256
Bytes_sent 8844
Com_admin_commands 0
Com_assign_to_keycache 0
Com_alter_db 0
Com_alter_db_upgrade 0
Com_alter_event 0
Com_alter_function 0
Com_alter_procedure 0
Com_alter_server 0
Com_alter_table 0
Com_alter_tablespace 0
Com_analyze 0
Com_backup_table 0
Com_begin 0
Com_binlog 0
Com_call_procedure 0
Com_change_db 1
Com_change_master 0
Com_check 0
Com_checksum 0
Com_commit 0
Com_create_db 0
Com_create_event 0
Com_create_function 0
Com_create_index 0
Com_create_procedure 0
Com_create_server 0
Com_create_table 0
Com_create_trigger 0
Com_create_udf 0
Com_create_user 0
Com_create_view 0
Com_dealloc_sql 0
Com_delete 0
Com_delete_multi 0
Com_do 0
Com_drop_db 0
Com_drop_event 0
Com_drop_function 0
Com_drop_index 0
Com_drop_procedure 0
Com_drop_server 0
Com_drop_table 0
Com_drop_trigger 0
Com_drop_user 0
Com_drop_view 0
Com_empty_query 0
Com_execute_sql 0
Com_flush 0
Com_grant 0
Com_ha_close 0
Com_ha_open 0
Com_ha_read 0
Com_help 0
Com_insert 0
Com_insert_select 0
Com_install_plugin 0
Com_kill 0
Com_load 0
Com_load_master_data 0
Com_load_master_table 0
Com_lock_tables 0
Com_optimize 0
Com_preload_keys 0
Com_prepare_sql 0
Com_purge 0
Com_purge_before_date 0
Com_release_savepoint 0
Com_rename_table 0
Com_rename_user 0
Com_repair 0
Com_replace 0
Com_replace_select 0
Com_reset 0
Com_restore_table 0
Com_revoke 0
Com_revoke_all 0
Com_rollback 0
Com_rollback_to_savepoint 0
Com_savepoint 0
Com_select 1
Com_set_option 3
Com_show_authors 0
Com_show_binlog_events 0
Com_show_binlogs 0
Com_show_charsets 0
Com_show_collations 0
Com_show_column_types 0
Com_show_contributors 0
Com_show_create_db 0
Com_show_create_event 0
Com_show_create_func 0
Com_show_create_proc 0
Com_show_create_table 1
Com_show_create_trigger 0
Com_show_databases 0
Com_show_engine_logs 0
Com_show_engine_mutex 0
Com_show_engine_status 0
Com_show_events 0
Com_show_errors 0
Com_show_fields 1
Com_show_function_status 0
Com_show_grants 0
Com_show_keys 1
Com_show_master_status 0
Com_show_new_master 0
Com_show_open_tables 0
Com_show_plugins 0
Com_show_privileges 0
Com_show_procedure_status 0
Com_show_processlist 0
Com_show_profile 0
Com_show_profiles 0
Com_show_slave_hosts 0
Com_show_slave_status 0
Com_show_status 21
Com_show_storage_engines 0
Com_show_table_status 0
Com_show_tables 0
Com_show_triggers 0
Com_show_variables 0
Com_show_warnings 0
Com_slave_start 0
Com_slave_stop 0
Com_stmt_close 0
Com_stmt_execute 0
Com_stmt_fetch 0
Com_stmt_prepare 0
Com_stmt_reprepare 0
Com_stmt_reset 0
Com_stmt_send_long_data 0
Com_truncate 0
Com_uninstall_plugin 0
Com_unlock_tables 0
Com_update 0
Com_update_multi 0
Com_xa_commit 0
Com_xa_end 0
Com_xa_prepare 0
Com_xa_recover 0
Com_xa_rollback 0
Com_xa_start 0
Compression ON
Connections 323
Created_tmp_disk_tables 1
Created_tmp_files 5
Created_tmp_tables 2
Delayed_errors 0
Delayed_insert_threads 0
Delayed_writes 0
Flush_commands 1
Handler_commit 1
Handler_delete 0
Handler_discover 0
Handler_prepare 0
Handler_read_first 0
Handler_read_key 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 39
Handler_rollback 0
Handler_savepoint 0
Handler_savepoint_rollback 0
Handler_update 0
Handler_write 37
Innodb_buffer_pool_pages_data 43392
Innodb_buffer_pool_pages_dirty 0
Innodb_buffer_pool_pages_flushed 43822
Innodb_buffer_pool_pages_free 637198
Innodb_buffer_pool_pages_misc 562
Innodb_buffer_pool_pages_total 681152
Innodb_buffer_pool_read_ahead_rnd 9
Innodb_buffer_pool_read_ahead_seq 27
Innodb_buffer_pool_read_requests 36489397
Innodb_buffer_pool_reads 27421
Innodb_buffer_pool_wait_free 0
Innodb_buffer_pool_write_requests 4165371
Innodb_data_fsyncs 5228
Innodb_data_pending_fsyncs 0
Innodb_data_pending_reads 1
Innodb_data_pending_writes 0
Innodb_data_read 626216960
Innodb_data_reads 36565
Innodb_data_writes 293947
Innodb_data_written 1792826880
Innodb_dblwr_pages_written 43822
Innodb_dblwr_writes 830
Innodb_log_waits 0
Innodb_log_write_requests 492588
Innodb_log_writes 268248
Innodb_os_log_fsyncs 2130
Innodb_os_log_pending_fsyncs 0
Innodb_os_log_pending_writes 0
Innodb_os_log_written 356559872
Innodb_page_size 16384
Innodb_pages_created 5304
Innodb_pages_read 38087
Innodb_pages_written 43822
Innodb_row_lock_current_waits 0
Innodb_row_lock_time 0
Innodb_row_lock_time_avg 0
Innodb_row_lock_time_max 0
Innodb_row_lock_waits 0
Innodb_rows_deleted 28637
Innodb_rows_inserted 306449
Innodb_rows_read 16579740
Innodb_rows_updated 887251
Key_blocks_not_flushed 0
Key_blocks_unused 212928
Key_blocks_used 1415
Key_read_requests 393323
Key_reads 16
Key_write_requests 102461
Key_writes 102439
Last_query_cost 9142769.199000
Max_used_connections 19
Not_flushed_delayed_rows 0
Open_files 24
Open_streams 0
Open_table_definitions 142
Open_tables 146
Opened_files 592
Opened_table_definitions 0
Opened_tables 0
Prepared_stmt_count 0
Qcache_free_blocks 0
Qcache_free_memory 0
Qcache_hits 0
Qcache_inserts 0
Qcache_lowmem_prunes 0
Qcache_not_cached 0
Qcache_queries_in_cache 0
Qcache_total_blocks 0
Queries 1578897
Questions 30
Rpl_status NULL
Select_full_join 0
Select_full_range_join 0
Select_range 0
Select_range_check 0
Select_scan 2
Slave_open_temp_tables 0
Slave_retried_transactions 0
Slave_running OFF
Slow_launch_threads 0
Slow_queries 0
Sort_merge_passes 0
Sort_range 0
Sort_rows 0
Sort_scan 0
Ssl_accept_renegotiates 0
Ssl_accepts 0
Ssl_callback_cache_hits 0
Ssl_cipher
Ssl_cipher_list
Ssl_client_connects 0
Ssl_connect_renegotiates 0
Ssl_ctx_verify_depth 0
Ssl_ctx_verify_mode 0
Ssl_default_timeout 0
Ssl_finished_accepts 0
Ssl_finished_connects 0
Ssl_session_cache_hits 0
Ssl_session_cache_misses 0
Ssl_session_cache_mode NONE
Ssl_session_cache_overflows 0
Ssl_session_cache_size 0
Ssl_session_cache_timeouts 0
Ssl_sessions_reused 0
Ssl_used_session_cache_entries 0
Ssl_verify_depth 0
Ssl_verify_mode 0
Ssl_version
Table_locks_immediate 1549525
Table_locks_waited 0
Tc_log_max_pages_used 0
Tc_log_page_size 0
Tc_log_page_waits 0
Threads_cached 0
Threads_connected 17
Threads_created 322
Threads_running 2
Uptime 8093
Uptime_since_flush_status 8093
mysql>show variables;
Variable_name Value
auto_increment_increment 1
auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
back_log 50
big_tables OFF
binlog_cache_size 32768
binlog_direct_non_transactional_updates OFF
binlog_format STATEMENT
bulk_insert_buffer_size 8388608
character_set_client utf8
character_set_connection utf8
character_set_database utf8
character_set_filesystem binary
character_set_results utf8
character_set_server utf8
character_set_system utf8
collation_connection utf8_general_ci
collation_database utf8_general_ci
collation_server utf8_general_ci
completion_type 0
concurrent_insert 1
connect_timeout 10
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_week_format 0
delay_key_write ON
delayed_insert_limit 100
delayed_insert_timeout 300
delayed_queue_size 1000
div_precision_increment 4
engine_condition_pushdown ON
error_count 0
event_scheduler OFF
expire_logs_days 0
flush OFF
flush_time 0
foreign_key_checks ON
ft_boolean_syntax + -><()~*:""&|
ft_max_word_len 84
ft_min_word_len 4
ft_query_expansion_limit 20
ft_stopword_file (built-in)
general_log OFF
group_concat_max_len 1024
have_community_features YES
have_compress YES
have_crypt YES
have_csv YES
have_dynamic_loading YES
have_geometry YES
have_innodb YES
have_ndbcluster NO
have_openssl DISABLED
have_partitioning NO
have_query_cache YES
have_rtree_keys YES
have_ssl DISABLED
have_symlink YES
hostname localhost.localdomain
identity 0
ignore_builtin_innodb OFF
init_connect
init_file
init_slave
innodb_adaptive_hash_index ON
innodb_additional_mem_pool_size 67108864
innodb_autoextend_increment 8
innodb_autoinc_lock_mode 1
innodb_buffer_pool_size 11159994368
innodb_checksums ON
innodb_commit_concurrency 0
innodb_concurrency_tickets 500
innodb_data_file_path ibdata1:10M:autoextend
innodb_data_home_dir
innodb_doublewrite ON
innodb_fast_shutdown 1
innodb_file_io_threads 4
innodb_file_per_table ON
innodb_flush_log_at_trx_commit 2
innodb_flush_method O_DIRECT
innodb_force_recovery 0
innodb_lock_wait_timeout 120
innodb_locks_unsafe_for_binlog ON
innodb_log_buffer_size 134217728
innodb_log_file_size 5242880
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
innodb_max_dirty_pages_pct 90
innodb_max_purge_lag 0
innodb_mirrored_log_groups 1
innodb_open_files 300
innodb_rollback_on_timeout OFF
innodb_stats_on_metadata ON
innodb_support_xa ON
innodb_sync_spin_loops 20
innodb_table_locks ON
innodb_thread_concurrency 8
innodb_thread_sleep_delay 10000
innodb_use_legacy_cardinality_algorithm ON
insert_id 0
interactive_timeout 28800
join_buffer_size 268435456
keep_files_on_create OFF
key_buffer_size 268435456
key_cache_age_threshold 300
key_cache_block_size 1024
key_cache_division_limit 100
large_files_support ON
large_page_size 0
large_pages OFF
last_insert_id 0
lc_time_names en_US
license Commercial
local_infile ON
locked_in_memory OFF
log OFF
log_bin OFF
log_bin_trust_function_creators OFF
log_bin_trust_routine_creators OFF
log_output FILE
log_queries_not_using_indexes OFF
log_slave_updates OFF
log_slow_queries OFF
log_warnings 1
long_query_time 10.000000
low_priority_updates OFF
lower_case_file_system OFF
lower_case_table_names 1
max_allowed_packet 134217728
max_binlog_cache_size 18446744073709547520
max_binlog_size 1073741824
max_connect_errors 10
max_connections 300
max_delayed_threads 20
max_error_count 64
max_heap_table_size 268435456
max_insert_delayed_threads 20
max_join_size 18446744073709551615
max_length_for_sort_data 1024
max_prepared_stmt_count 16382
max_relay_log_size 0
max_seeks_for_key 18446744073709551615
max_sort_length 1024
max_sp_recursion_depth 0
max_tmp_tables 32
max_user_connections 0
max_write_lock_count 18446744073709551615
min_examined_row_limit 0
multi_range_count 256
myisam_data_pointer_size 6
myisam_max_sort_file_size 9223372036853727232
myisam_mmap_size 18446744073709551615
myisam_recover_options OFF
myisam_repair_threads 1
myisam_sort_buffer_size 8388608
myisam_stats_method nulls_unequal
myisam_use_mmap OFF
net_buffer_length 16384
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF
old OFF
old_alter_table OFF
old_passwords OFF
open_files_limit 10240
optimizer_prune_level 1
optimizer_search_depth 62
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on
port 3306
preload_buffer_size 32768
profiling OFF
profiling_history_size 15
protocol_version 10
pseudo_thread_id 18
query_alloc_block_size 8192
query_cache_limit 1048576
query_cache_min_res_unit 4096
query_cache_size 0
query_cache_type ON
query_cache_wlock_invalidate OFF
query_prealloc_size 8192
rand_seed1
rand_seed2
range_alloc_block_size 4096
read_buffer_size 67108864
read_only OFF
read_rnd_buffer_size 67108864
relay_log
relay_log_index
relay_log_info_file relay-log.info
relay_log_purge ON
relay_log_space_limit 0
report_host
report_password
report_port 3306
report_user
rpl_recovery_rank 0
secure_auth OFF
secure_file_priv
server_id 0
skip_external_locking ON
skip_name_resolve ON
skip_networking OFF
skip_show_database OFF
slave_compressed_protocol OFF
slave_exec_mode STRICT
slave_net_timeout 3600
slave_skip_errors OFF
slave_transaction_retries 10
slow_launch_time 2
slow_query_log OFF
sort_buffer_size 16777216
sql_auto_is_null ON
sql_big_selects ON
sql_big_tables OFF
sql_buffer_result OFF
sql_log_bin ON
sql_log_off OFF
sql_log_update ON
sql_low_priority_updates OFF
sql_max_join_size 18446744073709551615
sql_mode
sql_notes ON
sql_quote_show_create ON
sql_safe_updates OFF
sql_select_limit 18446744073709551615
sql_slave_skip_counter
sql_warnings OFF
ssl_ca
ssl_capath
ssl_cert
ssl_cipher
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