InnoDB + TokuDBがいっぱいになるRAM次にスワップを開始します
最近、データベースの問題に直面しようとしています。 MyISAMからTokuDB v7.0.4とInnoDBに移行しました。 MariaDBを使用しています-5.5.34-MariaDB-1〜wheezy-log。私の問題は、MariaDBがRAMを約90％まで満たしてからスワッピングを開始することです。スワップがいっぱいになると、パフォーマンスが本当に悪くなります-topは平均40の負荷を示します。 restart（kill -9 to mysql process）RAMそしてSWAPは空になり、すべてが最初から始まります。
2つのデータベースがあります。
1つ目は書き込みと読み取りが集中することです。
- 300万行の平均を持つ1152個のテーブル
- すべてのテーブルがTokuDBエンジンを使用
二つ目：
- 100万行の平均を持つ113個のテーブル
- すべてのテーブルがInnoDBエンジンを使用
私の設定/etc/mysql/my.cnf：
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
Nice = 0
[mysqld]
user = mysql
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
skip-external-locking
tmp_table_size = 128MB
key_buffer = 75M
max_allowed_packet = 1000M
thread_stack = 192K
thread_cache_size = 8
myisam-recover = BACKUP
max_connections = 500
query_cache_limit = 3M
query_cache_size = 150M
log_error = /var/log/mysql/error.log
log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time = 30
log-queries-not-using-indexes
expire_logs_days = 1
max_binlog_size = 500M
innodb_buffer_pool_size = 4G
innodb_log_file_size = 100M
innodb_log_buffer_size = 128M
innodb_data_home_dir = /var/lib/mysql
innodb_data_file_path = ibdata1:10M:autoextend
innodb_mirrored_log_groups = 1
innodb_log_group_home_dir = /var/lib/mysql
innodb_log_files_in_group = 2
innodb_stats_on_metadata=0
innodb_file_per_table
innodb_flush_method=O_DIRECT
innodb_write_io_threads = 8
innodb_read_io_threads = 8
innodb_flush_log_at_trx_commit = 2
innodb_max_dirty_pages_pct = 90
[mysqldump]
quick
quote-names
max_allowed_packet = 24M
[isamchk]
key_buffer = 120M
[myisamchk]
key_buffer = 120M
sort_buffer_size = 20M
read_buffer = 20M
write_buffer = 20M
tokudb_cache_size = 5G
サーバーの仕様：
- OS：Debian Wheezy 64ビット
- Intel Xeon E5506 @ 2.13Ghz、4コア
- 16 GBのRAM
- 2TB SATAハードドライブ
Mysqltunerスクリプトの出力：
-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.5.34-MariaDB-1~wheezy-log
[OK] Operating on 64-bit architecture
-------- Storage Engine Statistics -------------------------------------------
[--] Status: +Archive -BDB +Federated +InnoDB -ISAM -NDBCluster
[--] Data in TokuDB tables: 45G (Tables: 2956)
[--] Data in MyISAM tables: 88B (Tables: 10)
[--] Data in InnoDB tables: 9G (Tables: 250)
[--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17)
[!!] Total fragmented tables: 2983
-------- Performance Metrics -------------------------------------------------
[--] Up for: 12h 16m 36s (40M q [906.321 qps], 81K conn, TX: 7B, RX: 15B)
[--] Reads / Writes: 30% / 70%
[--] Total buffers: 4.4G global + 2.7M per thread (500 max threads)
[OK] Maximum possible memory usage: 5.7G (36% of installed RAM)
[OK] Slow queries: 1% (613K/40M)
[OK] Highest usage of available connections: 3% (17/500)
[OK] Key buffer size / total MyISAM indexes: 75.0M/123.0K
[OK] Key buffer hit rate: 95.0% (202 cached / 10 reads)
[OK] Query cache efficiency: 38.4% (7M cached / 18M selects)
[!!] Query cache prunes per day: 3629953
[OK] Sorts requiring temporary tables: 0% (6 temp sorts / 69K sorts)
[OK] Temporary tables created on disk: 0% (2K on disk / 655K total)
[OK] Thread cache hit rate: 99% (53 created / 81K connections)
[!!] Table cache hit rate: 0% (400 open / 911K opened)
[OK] Open file limit used: 0% (5/2K)
[OK] Table locks acquired immediately: 100% (41M immediate / 41M locks)
[!!] InnoDB data size / buffer pool: 9.1G/4.0G
-------- Recommendations -----------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
MySQL started within last 24 hours - recommendations may be inaccurate
Increasing the query_cache size over 128M may reduce performance
Increase table_cache gradually to avoid file descriptor limits
Variables to adjust:
long_query_time (<= 10)
query_cache_size (> 150M) [see warning above]
table_cache (> 400)
innodb_buffer_pool_size (>= 9G)
私はDBAの経験がなく、アイデアが残っていません。私はinnodbバッファーポーリングとtokudbキャッシュサイズの微調整を試してみました。クエリキャッシュをオフにしてみました。何も役に立たなかった。だから私はあなたに助けを求めることにしました。
更新
show global statusの出力を表示することにしました。たぶん誰かが不審なものを見つけられるかもしれません。
Variable_name Value
Aborted_clients 6
Aborted_connects 9
Access_denied_errors 15
Aria_pagecache_blocks_not_flushed 0
Aria_pagecache_blocks_unused 15737
Aria_pagecache_blocks_used 11974
Aria_pagecache_read_requests 3266804
Aria_pagecache_reads 2723
Aria_pagecache_write_requests 82149
Aria_pagecache_writes 0
Aria_transaction_log_syncs 0
Binlog_commits 0
Binlog_group_commits 0
Binlog_snapshot_file
Binlog_snapshot_position 0
Binlog_bytes_written 0
Binlog_cache_disk_use 0
Binlog_cache_use 0
Binlog_stmt_cache_disk_use 0
Binlog_stmt_cache_use 0
Busy_time 0.000000
Bytes_received 28113353524
Bytes_sent 12542509166
Com_admin_commands 5
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 1
Com_alter_tablespace 0
Com_analyze 0
Com_assign_to_keycache 0
Com_begin 44501
Com_binlog 0
Com_call_procedure 0
Com_change_db 4437
Com_change_master 0
Com_check 0
Com_checksum 0
Com_commit 44498
Com_create_db 1
Com_create_event 0
Com_create_function 0
Com_create_index 0
Com_create_procedure 0
Com_create_server 0
Com_create_table 490956
Com_create_trigger 0
Com_create_udf 0
Com_create_user 0
Com_create_view 0
Com_dealloc_sql 0
Com_delete 59
Com_delete_multi 0
Com_do 0
Com_drop_db 1
Com_drop_event 0
Com_drop_function 0
Com_drop_index 0
Com_drop_procedure 0
Com_drop_server 0
Com_drop_table 1
Com_drop_trigger 0
Com_drop_user 1
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Com_empty_query 0
Com_execute_sql 0
Com_flush 1
Com_grant 3
Com_ha_close 0
Com_ha_open 0
Com_ha_read 0
Com_help 0
Com_insert 46287224
Com_insert_select 0
Com_install_plugin 0
Com_kill 0
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 4
Com_revoke_all 0
Com_rollback 0
Com_rollback_to_savepoint 0
Com_savepoint 0
Com_select 27056617
Com_set_option 1919230
Com_show_authors 0
Com_show_binlog_events 0
Com_show_binlogs 44
Com_show_charsets 0
Com_show_client_statistics 0
Com_show_collations 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 2966
Com_show_create_trigger 0
Com_show_databases 43
Com_show_engine_logs 0
Com_show_engine_mutex 0
Com_show_engine_status 0
Com_show_errors 0
Com_show_events 0
Com_show_fields 1031
Com_show_function_status 1
Com_show_grants 8
Com_show_index_statistics 0
Com_show_keys 9
Com_show_master_status 14
Com_show_open_tables 0
Com_show_plugins 134
Com_show_privileges 0
Com_show_procedure_status 1
Com_show_processlist 27
Com_show_profile 0
Com_show_profiles 0
Com_show_relaylog_events 0
Com_show_slave_hosts 0
Com_show_slave_status 14
Com_show_status 4
Com_show_storage_engines 1
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Com_show_table_status 3091
Com_show_tables 44570
Com_show_triggers 1480
Com_show_user_statistics 0
Com_show_variables 1513
Com_show_warnings 0
Com_signal 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 415025
Com_update_multi 1
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 100165
Cpu_time 0.000000
Created_tmp_disk_tables 2947
Created_tmp_files 38
Created_tmp_tables 697141
Delayed_errors 0
Delayed_insert_threads 0
Delayed_writes 0
Empty_queries 4693258
Executed_events 0
Executed_triggers 0
Feature_dynamic_columns 0
Feature_fulltext 0
Feature_gis 0
Feature_locale 0
Feature_subquery 34643715
Feature_timezone 0
Feature_trigger 0
Feature_xml 0
Flush_commands 2
Handler_commit 52953374
Handler_delete 176
Handler_discover 0
Handler_icp_attempts 540485778
Handler_icp_match 540448062
Handler_mrr_init 0
Handler_mrr_key_refills 0
Handler_mrr_rowid_refills 0
Handler_prepare 0
Handler_read_first 419
Handler_read_key 302247165
Handler_read_last 424
Handler_read_next 3416576982
Handler_read_prev 998710623
Handler_read_rnd 10721555
Handler_read_rnd_deleted 1437
Handler_read_rnd_next 680507748
Handler_rollback 1731700
Handler_savepoint 0
Handler_savepoint_rollback 0
Handler_tmp_update 346421
Handler_tmp_write 115890114
Handler_update 145750746
Handler_write 282321902
Innodb_adaptive_hash_cells 8850461
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Innodb_adaptive_hash_heap_buffers 48717
Innodb_adaptive_hash_non_hash_searches 129200278
Innodb_background_log_sync 80520
Innodb_buffer_pool_bytes_data 3496755200
Innodb_buffer_pool_bytes_dirty 78446592
Innodb_buffer_pool_pages_data 213425
Innodb_buffer_pool_pages_dirty 4788
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Innodb_buffer_pool_pages_free 0
Innodb_buffer_pool_pages_LRU_flushed 950
Innodb_buffer_pool_pages_made_not_young 0
Innodb_buffer_pool_pages_made_young 3224808
Innodb_buffer_pool_pages_misc 48718
Innodb_buffer_pool_pages_old 78764
Innodb_buffer_pool_pages_total 262143
Innodb_buffer_pool_read_ahead 999051
Innodb_buffer_pool_read_ahead_evicted 65880
Innodb_buffer_pool_read_ahead_rnd 0
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Innodb_buffer_pool_reads 1489673
Innodb_buffer_pool_wait_free 3
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Innodb_checkpoint_age 62569176
Innodb_checkpoint_max_age 169158206
Innodb_checkpoint_target_age 163872013
Innodb_current_row_locks 0
Innodb_data_fsyncs 163114
Innodb_data_pending_fsyncs 0
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Innodb_data_pending_writes 0
Innodb_data_read 42152087552
Innodb_data_reads 1589888
Innodb_data_writes 12690787
Innodb_data_written 81596944384
Innodb_dblwr_pages_written 1714891
Innodb_dblwr_writes 45021
Innodb_deadlocks 0
Innodb_descriptors_memory 8000
Innodb_dict_tables 258
Innodb_have_atomic_builtins ON
Innodb_history_list_length 3440
Innodb_ibuf_discarded_delete_marks 0
Innodb_ibuf_discarded_deletes 0
Innodb_ibuf_discarded_inserts 0
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Innodb_ibuf_merged_deletes 7446
Innodb_ibuf_merged_inserts 2751499
Innodb_ibuf_merges 87150
Innodb_ibuf_segment_size 67
Innodb_ibuf_size 1
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Innodb_log_write_requests 38893068
Innodb_log_writes 12298675
Innodb_lsn_current 359356342987
Innodb_lsn_flushed 359356017372
Innodb_lsn_last_checkpoint 359293773811
Innodb_master_thread_1_second_loops 91913
Innodb_master_thread_10_second_loops 9079
Innodb_master_thread_background_loops 3086
Innodb_master_thread_main_flush_loops 3083
Innodb_master_thread_sleeps 91773
Innodb_max_trx_id 123944571
Innodb_mem_adaptive_hash 869003616
Innodb_mem_dictionary 19665864
Innodb_mem_total 4408213504
Innodb_mutex_os_waits 647322
Innodb_mutex_spin_rounds 22796538
Innodb_mutex_spin_waits 2620935
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Innodb_os_log_written 25398928384
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Innodb_rows_read 3639327429
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Innodb_s_lock_spin_rounds 4627415
Innodb_s_lock_spin_waits 475342
Innodb_truncated_status_writes 0
Innodb_x_lock_os_waits 550959
Innodb_x_lock_spin_rounds 20838578
Innodb_x_lock_spin_waits 517023
Key_blocks_not_flushed 0
Key_blocks_unused 62954
Key_blocks_used 4
Key_blocks_warm 0
Key_read_requests 203
Key_reads 11
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Key_writes 13
Last_query_cost 0.000000
Max_used_connections 17
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Open_files 5
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Open_table_definitions 400
Open_tables 400
Opened_files 1007046
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Performance_schema_rwlock_classes_lost 0
Performance_schema_rwlock_instances_lost 0
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Performance_schema_thread_classes_lost 0
Performance_schema_thread_instances_lost 0
Prepared_stmt_count 0
Qcache_free_blocks 25955
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Queries 76417873
Questions 76417873
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Rpl_status AUTH_MASTER
Select_full_join 62
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Select_range 6794385
Select_range_check 0
Select_scan 700903
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Slave_retried_transactions 0
Slave_running OFF
Slow_launch_threads 0
Slow_queries 639282
Sort_merge_passes 9
Sort_range 64818
Sort_rows 5371097
Sort_scan 21126
Sphinx_error
Sphinx_time
Sphinx_total
Sphinx_total_found
Sphinx_Word_count
Sphinx_words
Ssl_accept_renegotiates 0
Ssl_accepts 0
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Ssl_cipher
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Ssl_ctx_verify_depth 0
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Ssl_default_timeout 0
Ssl_finished_accepts 0
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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
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Ssl_verify_depth 0
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Ssl_version
Subquery_cache_hit 0
Subquery_cache_miss 29396
Syncs 3009
Table_locks_immediate 89481327
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Tc_log_max_pages_used 0
Tc_log_page_size 4096
Tc_log_page_waits 0
Threadpool_idle_threads 0
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Threads_cached 6
Threads_connected 3
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Tokudb_DB_OPENS 1212408
Tokudb_DB_CLOSES 1211449
Tokudb_DB_OPEN_CURRENT 959
Tokudb_DB_OPEN_MAX 1368
Tokudb_CHECKPOINT_PERIOD 60
Tokudb_CHECKPOINT_LAST_BEGAN Tue Dec 31 07:36:41 2013
Tokudb_CHECKPOINT_LAST_COMPLETE_BEGAN Tue Dec 31 07:36:41 2013
Tokudb_CHECKPOINT_LAST_COMPLETE_ENDED Tue Dec 31 07:36:44 2013
Tokudb_CHECKPOINT_TAKEN 1455
Tokudb_CHECKPOINT_FAILED 0
Tokudb_CHECKPOINT_BEGIN_TIME 4658342
Tokudb_CHECKPOINT_LONG_BEGIN_TIME 0
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Tokudb_CACHETABLE_SIZE_LIMIT 8958926848
Tokudb_CACHETABLE_SIZE_WRITING 0
Tokudb_CACHETABLE_SIZE_NONLEAF 7649372
Tokudb_CACHETABLE_SIZE_LEAF 8413376851
Tokudb_CACHETABLE_SIZE_ROLLBACK 1920
Tokudb_CACHETABLE_SIZE_CACHEPRESSURE 292993
Tokudb_CACHETABLE_EVICTIONS 139222
Tokudb_CACHETABLE_CLEANER_EXECUTIONS 103154
Tokudb_CACHETABLE_CLEANER_PERIOD 1
Tokudb_CACHETABLE_CLEANER_ITERATIONS 5
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Tokudb_CACHETABLE_LONG_WAIT_PRESSURE_COUNT 0
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Tokudb_LOCKTREE_MEMORY_SIZE 0
Tokudb_LOCKTREE_MEMORY_SIZE_LIMIT 1052756992
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Tokudb_LOCKTREE_LATEST_POST_ESCALATION_MEMORY_SIZE 0
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Tokudb_LOCKTREE_TIMEOUT_COUNT 1
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Tokudb_LOCKTREE_LONG_WAIT_ESCALATION_COUNT 0
Tokudb_LOCKTREE_LONG_WAIT_ESCALATION_TIME 0
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Tokudb_DICTIONARY_BROADCAST_UPDATES 0
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Tokudb_LEAF_NODES_FLUSHED_NOT_CHECKPOINT 24913
Tokudb_LEAF_NODES_FLUSHED_NOT_CHECKPOINT_BYTES 41927164416
Tokudb_LEAF_NODES_FLUSHED_NOT_CHECKPOINT_UNCOMPRESSED_BYTES 41930114613
Tokudb_LEAF_NODES_FLUSHED_NOT_CHECKPOINT_SECONDS 358.312359
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_NOT_CHECKPOINT 5244
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_NOT_CHECKPOINT_BYTES 80217088
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_NOT_CHECKPOINT_UNCOMPRESSE 78373409
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_NOT_CHECKPOINT_SECONDS 70.766602
Tokudb_LEAF_NODES_FLUSHED_CHECKPOINT 109957
Tokudb_LEAF_NODES_FLUSHED_CHECKPOINT_BYTES 198141904896
Tokudb_LEAF_NODES_FLUSHED_CHECKPOINT_UNCOMPRESSED_BYTES 198100386193
Tokudb_LEAF_NODES_FLUSHED_CHECKPOINT_SECONDS 1588.077420
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_CHECKPOINT 11964
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_CHECKPOINT_BYTES 197548544
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_CHECKPOINT_UNCOMPRESSED_BY 193219858
Tokudb_NONLEAF_NODES_FLUSHED_TO_DISK_CHECKPOINT_SECONDS 101.451135
Tokudb_NONLEAF_NODE_PARTIAL_EVICTIONS 2243
Tokudb_NONLEAF_NODE_PARTIAL_EVICTIONS_BYTES 475479
Tokudb_LEAF_NODE_PARTIAL_EVICTIONS 130527
Tokudb_LEAF_NODE_PARTIAL_EVICTIONS_BYTES 23918330873
Tokudb_LEAF_NODE_FULL_EVICTIONS 101982
Tokudb_LEAF_NODE_FULL_EVICTIONS_BYTES 67069576676
Tokudb_NONLEAF_NODE_FULL_EVICTIONS 37240
Tokudb_NONLEAF_NODE_FULL_EVICTIONS_BYTES 113897114
Tokudb_LEAF_NODES_CREATED 4359
Tokudb_NONLEAF_NODES_CREATED 286
Tokudb_LEAF_NODES_DESTROYED 211939
Tokudb_NONLEAF_NODES_DESTROYED 49204
Tokudb_MESSAGES_INJECTED_AT_ROOT_BYTES 69875936
Tokudb_MESSAGES_FLUSHED_FROM_H1_TO_LEAVES_BYTES 78773311
Tokudb_MESSAGES_IN_TREES_ESTIMATE_BYTES 18446744073700654241
Tokudb_MESSAGES_INJECTED_AT_ROOT 1500645
Tokudb_BROADCASE_MESSAGES_INJECTED_AT_ROOT 0
Tokudb_BASEMENTS_DECOMPRESSED_TARGET_QUERY 3019
Tokudb_BASEMENTS_DECOMPRESSED_PRELOCKED_RANGE 409
Tokudb_BASEMENTS_DECOMPRESSED_PREFETCH 0
Tokudb_BASEMENTS_DECOMPRESSED_FOR_WRITE 8130
Tokudb_BUFFERS_DECOMPRESSED_TARGET_QUERY 36606
Tokudb_BUFFERS_DECOMPRESSED_PRELOCKED_RANGE 2031
Tokudb_BUFFERS_DECOMPRESSED_PREFETCH 0
Tokudb_BUFFERS_DECOMPRESSED_FOR_WRITE 75381
Tokudb_PIVOTS_FETCHED_FOR_QUERY 70130
Tokudb_PIVOTS_FETCHED_FOR_QUERY_BYTES 731984896
Tokudb_PIVOTS_FETCHED_FOR_QUERY_SECONDS 252.842367
Tokudb_PIVOTS_FETCHED_FOR_PREFETCH 13724
Tokudb_PIVOTS_FETCHED_FOR_PREFETCH_BYTES 449675776
Tokudb_PIVOTS_FETCHED_FOR_PREFETCH_SECONDS 149.464950
Tokudb_PIVOTS_FETCHED_FOR_WRITE 1901
Tokudb_PIVOTS_FETCHED_FOR_WRITE_BYTES 33412096
Tokudb_PIVOTS_FETCHED_FOR_WRITE_SECONDS 20.615276
Tokudb_BASEMENTS_FETCHED_TARGET_QUERY 99068
Tokudb_BASEMENTS_FETCHED_TARGET_QUERY_BYTES 6364541952
Tokudb_BASEMENTS_FETCHED_TARGET_QUERY_SECONDS 414.452038
Tokudb_BASEMENTS_FETCHED_PRELOCKED_RANGE 44959
Tokudb_BASEMENTS_FETCHED_PRELOCKED_RANGE_BYTES 5496332288
Tokudb_BASEMENTS_FETCHED_PRELOCKED_RANGE_SECONDS 44.115034
Tokudb_BASEMENTS_FETCHED_PREFETCH 287803
Tokudb_BASEMENTS_FETCHED_PREFETCH_BYTES 35601422848
Tokudb_BASEMENTS_FETCHED_PREFETCH_SECONDS 304.268452
Tokudb_BASEMENTS_FETCHED_FOR_WRITE 102644
Tokudb_BASEMENTS_FETCHED_FOR_WRITE_BYTES 13071339520
Tokudb_BASEMENTS_FETCHED_FOR_WRITE_SECONDS 208.484657
Tokudb_BUFFERS_FETCHED_TARGET_QUERY 3628
Tokudb_BUFFERS_FETCHED_TARGET_QUERY_BYTES 1894912
Tokudb_BUFFERS_FETCHED_TARGET_QUERY_SECONDS 3.171866
Tokudb_BUFFERS_FETCHED_PRELOCKED_RANGE 4620
Tokudb_BUFFERS_FETCHED_PRELOCKED_RANGE_BYTES 2748416
Tokudb_BUFFERS_FETCHED_PRELOCKED_RANGE_SECONDS 0.004685
Tokudb_BUFFERS_FETCHED_PREFETCH 0
Tokudb_BUFFERS_FETCHED_PREFETCH_BYTES 0
Tokudb_BUFFERS_FETCHED_PREFETCH_SECONDS 0.000000
Tokudb_BUFFERS_FETCHED_FOR_WRITE 20512
Tokudb_BUFFERS_FETCHED_FOR_WRITE_BYTES 21059584
Tokudb_BUFFERS_FETCHED_FOR_WRITE_SECONDS 6.374809
Tokudb_LEAF_COMPRESSION_TO_MEMORY_SECONDS 141.270891
Tokudb_LEAF_SERIALIZATION_TO_MEMORY_SECONDS 554.255095
Tokudb_LEAF_DECOMPRESSION_TO_MEMORY_SECONDS 36.843302
Tokudb_LEAF_DESERIALIZATION_TO_MEMORY_SECONDS 189.921701
Tokudb_NONLEAF_COMPRESSION_TO_MEMORY_SECONDS 1.267383
Tokudb_NONLEAF_SERIALIZATION_TO_MEMORY_SECONDS 1.102747
Tokudb_NONLEAF_DECOMPRESSION_TO_MEMORY_SECONDS 0.332357
Tokudb_NONLEAF_DESERIALIZATION_TO_MEMORY_SECONDS 2.638986
Tokudb_PROMOTION_ROOTS_SPLIT 271
Tokudb_PROMOTION_LEAF_ROOTS_INJECTED_INTO 90293
Tokudb_PROMOTION_H1_ROOTS_INJECTED_INTO 300114
Tokudb_PROMOTION_INJECTIONS_AT_DEPTH_0 90649
Tokudb_PROMOTION_INJECTIONS_AT_DEPTH_1 2640443
Tokudb_PROMOTION_INJECTIONS_AT_DEPTH_2 15175801
Tokudb_PROMOTION_INJECTIONS_AT_DEPTH_3 2527856
Tokudb_PROMOTION_INJECTIONS_LOWER_THAN_DEPTH_3 0
Tokudb_PROMOTION_STOPPED_NONEMPTY_BUFFER 1196160
Tokudb_PROMOTION_STOPPED_AT_HEIGHT_1 3797
Tokudb_PROMOTION_STOPPED_CHILD_LOCKED_OR_NOT_IN_MEMORY 58
Tokudb_PROMOTION_STOPPED_CHILD_NOT_FULLY_IN_MEMORY 1
Tokudb_PROMOTION_STOPPED_AFTER_LOCKING_CHILD 236
Tokudb_TXN_BEGIN 301685794
Tokudb_TXN_BEGIN_READ_ONLY 4054465
Tokudb_TXN_COMMITS 52337225
Tokudb_TXN_ABORTS 253403034
Tokudb_LOGGER_WRITES 170699
Tokudb_LOGGER_WRITES_BYTES 3321447066
Tokudb_LOGGER_WRITES_UNCOMPRESSED_BYTES 3321447066
Tokudb_LOGGER_WRITES_SECONDS 73.974175
Tokudb_LOADER_NUM_CREATED 0
Tokudb_LOADER_NUM_CURRENT 0
Tokudb_LOADER_NUM_MAX 0
Tokudb_MEM_ESTIMATED_MAXIMUM_MEMORY_FOOTPRINT 0
Tokudb_FILESYSTEM_THREADS_BLOCKED_BY_FULL_DISK 0
Tokudb_FILESYSTEM_FSYNC_TIME 2596297102
Tokudb_FILESYSTEM_FSYNC_NUM 1661099
Tokudb_FILESYSTEM_LONG_FSYNC_TIME 211408334
Tokudb_FILESYSTEM_LONG_FSYNC_NUM 119
Uptime 87347
Uptime_since_flush_status 87347
本当にあなたの助けに感謝します！ありがとうございました ！
一部のテーブルにInnoDBを使用し、他のテーブルにTokuDBを使用するのはなぜですか？メモリ使用量に関して、サーバー上のmysqldプロセスの「トップ」レポートは何ですか？ MySQLサーバーが9Gを超えるRAMを使用してはならないというmy.cnfを見てください。 mysqld RSSが実際に16Gマークまで成長している場合は、InnoDBとTokuDBの両方のキャッシュサイズを下げて、RSSが低下するかどうかを確認してください。
カーネルのswappinessが0であることを確認します。
cat/proc/sys/vm/swappiness echo 0>/proc/sys/vm/swappiness
あなたのワークロードは何ですか？おそらく、同時実行性のある貧弱なSQLクエリがたくさんあり、セッションごとのバッファ（sort_buffer_size、join_buffer_sizeなど）が殺されているか、ワークロードのメモリで多くのtmp_tableが使用されています。開始からスワッピングまでのステータス変数のデルタを確認すると、MySQLが内部で何を行っているかについてさらに知ることができます。
グローバルステータスを表示;