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MySqlサーバーに問題があり、常に凍結しています。 phpMyAdminでは、 "Show Processlist"には、コマンド "connect"と "net from reading"を持つユーザ "unauthenticated user"のプロセスがたくさんあります。MySQLのパフォーマンスと変数の微調整
データベースはInnoDBを使用していますが、MyISAMを実行する1つのテーブルを使用してフルテキスト検索を実行することもできます。サーバーには約4GBのメモリがあり、500MB未満のメモリが使用されています。
インデックスを使用しないクエリを検索するために、MySqlの低速クエリログを使用しています。私はまた、私はいくつかの変更/サーバーの変数を微調整する必要があると思う。
私は本当にここでいくつかの助けを使うことができたので、私はここでグローバル状況とショーグローバル変数の両方を投稿しています。
現在SHOW GLOBAL STATUS：
Variable_name Value
Aborted_clients 730
Aborted_connects 35
Binlog_cache_disk_use 0
Binlog_cache_use 0
Binlog_stmt_cache_disk_use 0
Binlog_stmt_cache_use 0
Bytes_received 31558148370
Bytes_sent 556410688609
Com_admin_commands 4565
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 3
Com_alter_tablespace 0
Com_analyze 0
Com_begin 168
Com_binlog 0
Com_call_procedure 0
Com_change_db 26791502
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 584152
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 5871056
Com_insert_select 2833
Com_install_plugin 0
Com_kill 160
Com_load 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_resignal 0
Com_revoke 0
Com_revoke_all 0
Com_rollback 0
Com_rollback_to_savepoint 0
Com_savepoint 0
Com_select 21739455
Com_set_option 53600251
Com_signal 0
Com_show_authors 0
Com_show_binlog_events 0
Com_show_binlogs 217
Com_show_charsets 3
Com_show_collations 26786645
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 6412
Com_show_create_trigger 84
Com_show_databases 213
Variable_name Value
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 4389
Com_show_function_status 14
Com_show_grants 2
Com_show_keys 25
Com_show_master_status 5
Com_show_open_tables 0
Com_show_plugins 560
Com_show_privileges 0
Com_show_procedure_status 14
Com_show_processlist 189
Com_show_profile 0
Com_show_profiles 0
Com_show_relaylog_events 0
Com_show_slave_hosts 0
Com_show_slave_status 5
Com_show_status 156
Com_show_storage_engines 16
Com_show_table_status 4154
Com_show_tables 280
Com_show_triggers 4144
Com_show_variables 26786703
Com_show_warnings 2363
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 168
Com_update 2572452
Com_update_multi 35171
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 OFF
Connections 26787752
Created_tmp_disk_tables 119645
Created_tmp_files 7069
Created_tmp_tables 58427880
Delayed_errors 0
Delayed_insert_threads 0
Delayed_writes 0
Flush_commands 1
Handler_commit 30698922
Handler_delete 177424
Handler_discover 0
Handler_prepare 0
Handler_read_first 1239039
Handler_read_key 2226723080
Handler_read_last 9200
Handler_read_next 4186985860
Handler_read_prev 6811735740
Handler_read_rnd 8942473
Handler_read_rnd_next 16431972655
Handler_rollback 495
Handler_savepoint 0
Handler_savepoint_rollback 0
Handler_update 9720709
Handler_write 15014651212
Innodb_buffer_pool_pages_data 8173
Innodb_buffer_pool_pages_dirty 138
Innodb_buffer_pool_pages_flushed 34780758
Innodb_buffer_pool_pages_free 0
Innodb_buffer_pool_pages_misc 18
Innodb_buffer_pool_pages_total 8191
Innodb_buffer_pool_read_ahead_rnd 0
Innodb_buffer_pool_read_ahead 26163447
Innodb_buffer_pool_read_ahead_evicted 669245354
Innodb_buffer_pool_read_requests 19793139859
Innodb_buffer_pool_reads 1156881183
Innodb_buffer_pool_wait_free 0
Innodb_buffer_pool_write_requests 81288931
Innodb_data_fsyncs 8482576
Innodb_data_pending_fsyncs 0
Innodb_data_pending_reads 0
Innodb_data_pending_writes 0
Innodb_data_read 19409628139520
Innodb_data_reads 1184668281
Innodb_data_writes 25747879
Innodb_data_written 576917547008
Innodb_dblwr_pages_written 17390379
Innodb_dblwr_writes 255445
Innodb_have_atomic_builtins ON
Innodb_log_waits 0
Innodb_log_write_requests 6930648
Innodb_log_writes 7850155
Innodb_os_log_fsyncs 7976564
Variable_name Value
Innodb_os_log_pending_fsyncs 0
Innodb_os_log_pending_writes 0
Innodb_os_log_written 7007020032
Innodb_page_size 16384
Innodb_pages_created 78647
Innodb_pages_read 1184669628
Innodb_pages_written 17390379
Innodb_row_lock_current_waits 0
Innodb_row_lock_time 1116
Innodb_row_lock_time_avg 39
Innodb_row_lock_time_max 963
Innodb_row_lock_waits 28
Innodb_rows_deleted 177424
Innodb_rows_inserted 5863854
Innodb_rows_read 14138431339
Innodb_rows_updated 4886889
Innodb_truncated_status_writes 0
Key_blocks_not_flushed 0
Key_blocks_unused 13
Key_blocks_used 13
Key_read_requests 3458723878
Key_reads 49092342
Key_write_requests 462162
Key_writes 436874
Last_query_cost 0.000000
Max_used_connections 137
Not_flushed_delayed_rows 0
Open_files 0
Open_streams 0
Open_table_definitions 113
Open_tables 4
Opened_files 6485943
Opened_table_definitions 116
Opened_tables 31771706
Performance_schema_cond_classes_lost 0
Performance_schema_cond_instances_lost 0
Performance_schema_file_classes_lost 0
Performance_schema_file_handles_lost 0
Performance_schema_file_instances_lost 0
Performance_schema_locker_lost 0
Performance_schema_mutex_classes_lost 0
Performance_schema_mutex_instances_lost 0
Performance_schema_rwlock_classes_lost 0
Performance_schema_rwlock_instances_lost 0
Performance_schema_table_handles_lost 0
Performance_schema_table_instances_lost 0
Performance_schema_thread_classes_lost 0
Performance_schema_thread_instances_lost 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 191630861
Questions 191562751
Rpl_status AUTH_MASTER
Select_full_join 7193
Select_full_range_join 0
Select_range 957755
Select_range_check 0
Select_scan 57577013
Slave_heartbeat_period 0.000
Slave_open_temp_tables 0
Slave_received_heartbeats 0
Slave_retried_transactions 0
Slave_running OFF
Slow_launch_threads 0
Slow_queries 445
Sort_merge_passes 3531
Sort_range 5655320
Sort_rows 43857009
Sort_scan 757681
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 51310065
Variable_name Value
Table_locks_waited 14101
Tc_log_max_pages_used 0
Tc_log_page_size 0
Tc_log_page_waits 0
Threads_cached 0
Threads_connected 4
Threads_created 26787751
Threads_running 1
Uptime 1208447
Uptime_since_flush_status 1208447
現在SHOWグローバル変数：
Variable_name Value
auto_increment_increment 1
auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
back_log 50
basedir /usr
big_tables OFF
binlog_cache_size 32768
binlog_direct_non_transactional_updates OFF
binlog_format STATEMENT
binlog_stmt_cache_size 32768
bulk_insert_buffer_size 8388608
character_set_client latin1
character_set_connection latin1
character_set_database latin1
character_set_filesystem binary
character_set_results latin1
character_set_server latin1
character_set_system utf8
character_sets_dir /usr/share/mysql/charsets/
collation_connection latin1_swedish_ci
collation_database latin1_swedish_ci
collation_server latin1_swedish_ci
completion_type NO_CHAIN
concurrent_insert AUTO
connect_timeout 10
datadir /var/lib/mysql/
date_format %Y-%m-%d
datetime_format %Y-%m-%d %H:%i:%s
default_storage_engine InnoDB
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
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 3
ft_query_expansion_limit 20
ft_stopword_file (built-in)
general_log OFF
general_log_file /var/lib/mysql/db.log
group_concat_max_len 1024
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 YES
have_profiling YES
have_query_cache YES
have_rtree_keys YES
have_ssl DISABLED
have_symlink YES
hostname silldb5
ignore_builtin_innodb OFF
init_connect
init_file
init_slave
innodb_adaptive_flushing ON
innodb_adaptive_hash_index ON
innodb_additional_mem_pool_size 8388608
innodb_autoextend_increment 8
innodb_autoinc_lock_mode 1
innodb_buffer_pool_instances 1
innodb_buffer_pool_size 134217728
innodb_change_buffering all
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_format Antelope
innodb_file_format_check ON
innodb_file_format_max Antelope
innodb_file_per_table OFF
innodb_flush_log_at_trx_commit 1
innodb_flush_method
innodb_force_load_corrupted OFF
innodb_force_recovery 0
innodb_io_capacity 200
innodb_large_prefix OFF
innodb_lock_wait_timeout 50
innodb_locks_unsafe_for_binlog OFF
innodb_log_buffer_size 8388608
innodb_log_file_size 5242880
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
Variable_name Value
innodb_max_dirty_pages_pct 75
innodb_max_purge_lag 0
innodb_mirrored_log_groups 1
innodb_old_blocks_pct 37
innodb_old_blocks_time 0
innodb_open_files 300
innodb_purge_batch_size 20
innodb_purge_threads 0
innodb_random_read_ahead OFF
innodb_read_ahead_threshold 56
innodb_read_io_threads 4
innodb_replication_delay 0
innodb_rollback_on_timeout OFF
innodb_rollback_segments 128
innodb_spin_wait_delay 6
innodb_stats_method nulls_equal
innodb_stats_on_metadata ON
innodb_stats_sample_pages 8
innodb_strict_mode OFF
innodb_support_xa ON
innodb_sync_spin_loops 30
innodb_table_locks ON
innodb_thread_concurrency 0
innodb_thread_sleep_delay 10000
innodb_use_native_aio ON
innodb_use_sys_malloc ON
innodb_version 1.1.8
innodb_write_io_threads 4
interactive_timeout 28800
join_buffer_size 131072
keep_files_on_create OFF
key_buffer_size 16384
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
lc_messages en_US
lc_messages_dir /usr/share/mysql/
lc_time_names en_US
license GPL
local_infile ON
lock_wait_timeout 31536000
locked_in_memory OFF
log OFF
log_bin OFF
log_bin_trust_function_creators OFF
log_error /var/lib/mysql/db.err
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 0
max_allowed_packet 1048576
max_binlog_cache_size 18446744073709547520
max_binlog_size 1073741824
max_binlog_stmt_cache_size 18446744073709547520
max_connect_errors 10
max_connections 2000
max_delayed_threads 20
max_error_count 64
max_heap_table_size 16777216
max_insert_delayed_threads 20
max_join_size 18446744073709551615
max_length_for_sort_data 1024
max_long_data_size 1048576
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
metadata_locks_cache_size 1024
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 2048
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 10000
optimizer_prune_level 1
Variable_name Value
optimizer_search_depth 62
optimizer_switch index_merge=on,index_merge_union=on,index_merge_so...
performance_schema OFF
performance_schema_events_waits_history_long_size 10000
performance_schema_events_waits_history_size 10
performance_schema_max_cond_classes 80
performance_schema_max_cond_instances 1000
performance_schema_max_file_classes 50
performance_schema_max_file_handles 32768
performance_schema_max_file_instances 10000
performance_schema_max_mutex_classes 200
performance_schema_max_mutex_instances 1000000
performance_schema_max_rwlock_classes 30
performance_schema_max_rwlock_instances 1000000
performance_schema_max_table_handles 100000
performance_schema_max_table_instances 50000
performance_schema_max_thread_classes 50
performance_schema_max_thread_instances 1000
pid_file /var/run/mysqld/mysqld.pid
plugin_dir /usr/lib64/mysql/plugin
port 3306
preload_buffer_size 32768
profiling OFF
profiling_history_size 15
protocol_version 10
query_alloc_block_size 8192
query_cache_limit 1048576
query_cache_min_res_unit 4096
query_cache_size 8 388 608
query_cache_type ON
query_cache_wlock_invalidate OFF
query_prealloc_size 8192
range_alloc_block_size 4096
read_buffer_size 262144
read_only OFF
read_rnd_buffer_size 262144
relay_log
relay_log_index
relay_log_info_file relay-log.info
relay_log_purge ON
relay_log_recovery OFF
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 1
skip_external_locking ON
skip_name_resolve ON
skip_networking OFF
skip_show_database OFF
slave_compressed_protocol OFF
slave_exec_mode STRICT
slave_load_tmpdir /tmp
slave_net_timeout 3600
slave_skip_errors OFF
slave_transaction_retries 10
slave_type_conversions
slow_launch_time 2
slow_query_log OFF
slow_query_log_file /var/lib/mysql/slow.log
socket /var/lib/mysql/mysql.sock
sort_buffer_size 65536
sql_auto_is_null OFF
sql_big_selects ON
sql_big_tables OFF
sql_buffer_result OFF
sql_log_bin ON
sql_log_off OFF
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 0
sql_warnings OFF
ssl_ca
ssl_capath
ssl_cert
ssl_cipher
ssl_key
storage_engine InnoDB
sync_binlog 0
sync_frm ON
sync_master_info 0
sync_relay_log 0
sync_relay_log_info 0
system_time_zone CET
table_definition_cache 400
table_open_cache 4
thread_cache_size 100
thread_concurrency 8
thread_handling one-thread-per-connection
thread_stack 524288
time_format %H:%i:%s
Variable_name Value
time_zone SYSTEM
timed_mutexes OFF
tmp_table_size 16777216
tmpdir /tmp
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
tx_isolation REPEATABLE-READ
unique_checks ON
updatable_views_with_limit YES
version 5.5.20
version_comment MySQL Community Server (GPL) by Remi
version_compile_machine x86_64
version_compile_os Linux
wait_timeout 28800
低速なクエリを表示することはできますか？それは、うまく設計されていないクエリ、欠落しているインデックスなどと同じくらい簡単かもしれません。また、「ビュー」からのクエリは、ビューを生成する生のテーブルに行くことなく考えてもよいでしょう。 – DRapp
はい、クエリにも問題があるかもしれませんが、私はそれを検討しており、これが問題である可能性があることを理解しています。ここにすべての情報を投稿することは非常に難しいと思います。既に提供している情報を見て助言を与えることは可能でしょうか？ – Martin
申し訳ありませんが、私は構成設定によるオプティマイザではなく、単にクエリを書くことで...私は自分よりもハードウェア/設定レベルが高い人に任せます。 – DRapp