Mysql Mariadb偶尔会在filesort上崩溃
有一个已经运行了几年没有问题的应用程序。突然，我们开始看到Mariadb在各种查询过程中崩溃和恢复，这些查询似乎通常都运行filesort函数。我们做了很多复杂的查询，有时被迫对计算字段进行排序。这些以前都可以正常工作，所以我不相信这些查询本身有错 我不确定这是一个配置问题，还是一个bug或硬件问题。非常感谢您的帮助 服务器有16GB的ram和6个CPU 日志文件如下所示：Mysql Mariadb偶尔会在filesort上崩溃,mysql,crash,mariadb,out-of-memory,Mysql,Crash,Mariadb,Out Of Memory,有一个已经运行了几年没有问题的应用程序。突然，我们开始看到Mariadb在各种查询过程中崩溃和恢复，这些查询似乎通常都运行filesort函数。我们做了很多复杂的查询，有时被迫对计算字段进行排序。这些以前都可以正常工作，所以我不相信这些查询本身有错 我不确定这是一个配置问题，还是一个bug或硬件问题。非常感谢您的帮助 服务器有16GB的ram和6个CPU 日志文件如下所示： Version: '10.2.24-MariaDB-log' socket: '/mnt/volume-01-part1
Version: '10.2.24-MariaDB-log' socket: '/mnt/volume-01-part1/mysql/mysql.sock' port: 3306 MariaDB Server
2019-06-27 12:52:23 139999433680640 [ERROR] InnoDB: Table `mysql`.`innodb_table_stats` not found.
190627 12:53:18 [ERROR] mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
To report this bug, see https://mariadb.com/kb/en/reporting-bugs
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.
Server version: 10.2.24-MariaDB-log
key_buffer_size=10485760
read_buffer_size=2097152
max_used_connections=9
max_threads=102
thread_count=16
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 430185 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x7f53b80009a8
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x7f54287d1d30 thread_stack 0x30000
/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x56288037858e]
/usr/sbin/mysqld(handle_fatal_signal+0x30d)[0x56287fe0421d]
sigaction.c:0(__restore_rt)[0x7f576a7ca5d0]
/usr/sbin/mysqld(_Z8filesortP3THDP5TABLEP8FilesortP16Filesort_trackerP4JOINy+0x2b4)[0x56287fe02684]
/usr/sbin/mysqld(_Z17create_sort_indexP3THDP4JOINP13st_join_tableP8Filesort+0xd7)[0x56287fcb1b57]
/usr/sbin/mysqld(_ZN17Window_funcs_sort4execEP4JOINb+0x4a)[0x56287fd8ee2a]
/usr/sbin/mysqld(_ZN24Window_funcs_computation4execEP4JOINb+0x2a)[0x56287fd8f53a]
/usr/sbin/mysqld(_ZN7AGGR_OP8end_sendEv+0xe7)[0x56287fcc20d7]
/usr/sbin/mysqld(_Z24sub_select_postjoin_aggrP4JOINP13st_join_tableb+0x31)[0x56287fcc22a1]
/usr/sbin/mysqld(_ZN4JOIN10exec_innerEv+0x903)[0x56287fcc2bf3]
/usr/sbin/mysqld(_ZN4JOIN4execEv+0x33)[0x56287fcc2f43]
/usr/sbin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x11a)[0x56287fcc309a]
/usr/sbin/mysqld(_Z18mysql_derived_fillP3THDP3LEXP10TABLE_LIST+0x152)[0x56287fc4ae62]
/usr/sbin/mysqld(_Z27mysql_handle_single_derivedP3LEXP10TABLE_LISTj+0xe4)[0x56287fc4abd4]
/usr/sbin/mysqld(_ZN13st_join_table12preread_initEv+0xdf)[0x56287fca2fbf]
/usr/sbin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x2f8)[0x56287fca32c8]
/usr/sbin/mysqld(_ZN4JOIN10exec_innerEv+0xa3f)[0x56287fcc2d2f]
/usr/sbin/mysqld(_ZN4JOIN4execEv+0x33)[0x56287fcc2f43]
/usr/sbin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x11a)[0x56287fcc309a]
/usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x254)[0x56287fcc3bf4]
/usr/sbin/mysqld(+0x41c4ef)[0x56287fba74ef]
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x334d)[0x56287fc6e99d]
/usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x2de)[0x56287fc748ee]
/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x21f5)[0x56287fc77ac5]
/usr/sbin/mysqld(_Z10do_commandP3THD+0x165)[0x56287fc786e5]
/usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x1aa)[0x56287fd41e3a]
/usr/sbin/mysqld(handle_one_connection+0x3d)[0x56287fd41f5d]
pthread_create.c:0(start_thread)[0x7f576a7c2dd5]
/lib64/libc.so.6(clone+0x6d)[0x7f5768b64ead]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f53b800f130): [REMOVED]
Connection ID (thread ID): 31
Status: NOT_KILLED
Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /mnt/volume-01-part1/mysql
Resource Limits:
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 63458 63458 processes
Max open files 16364 16364 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 63458 63458 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
Core pattern: core
'aria_block_size', '8192'
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'aria_encrypt_tables', 'OFF'
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'auto_increment_offset', '1'
'autocommit', 'ON'
'automatic_sp_privileges', 'ON'
'back_log', '50'
'basedir', '/usr/'
'big_tables', 'OFF'
'binlog_annotate_row_events', 'ON'
'binlog_cache_size', '31457280'
'binlog_checksum', 'CRC32'
'binlog_commit_wait_count', '0'
'binlog_commit_wait_usec', '100000'
'binlog_direct_non_transactional_updates', 'OFF'
'binlog_format', 'MIXED'
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'character_sets_dir', '/usr/share/mysql/charsets/'
'check_constraint_checks', 'ON'
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'collation_database', 'utf8_general_ci'
'collation_server', 'latin1_swedish_ci'
'completion_type', 'NO_CHAIN'
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'core_file', 'OFF'
'datadir', '/mnt/volume-01-part1/mysql/'
'date_format', '%Y-%m-%d'
'datetime_format', '%Y-%m-%d %H:%i:%s'
'deadlock_search_depth_long', '15'
'deadlock_search_depth_short', '4'
'deadlock_timeout_long', '50000000'
'deadlock_timeout_short', '10000'
'debug_no_thread_alarm', 'OFF'
'default_master_connection', ''
'default_regex_flags', ''
'default_storage_engine', 'MyISAM'
'default_tmp_storage_engine', ''
'default_week_format', '0'
'delay_key_write', 'ON'
'delayed_insert_limit', '100'
'delayed_insert_timeout', '300'
'delayed_queue_size', '1000'
'div_precision_increment', '4'
'encrypt_binlog', 'OFF'
'encrypt_tmp_disk_tables', 'OFF'
'encrypt_tmp_files', 'OFF'
'enforce_storage_engine', ''
'eq_range_index_dive_limit', '0'
'error_count', '0'
'event_scheduler', 'OFF'
'expensive_subquery_limit', '100'
'expire_logs_days', '3'
'explicit_defaults_for_timestamp', 'OFF'
'external_user', ''
'extra_max_connections', '1'
'extra_port', '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'
'general_log_file', 'dtd-db-01.log'
'group_concat_max_len', '1048576'
'gtid_binlog_pos', '0-1-11007595'
'gtid_binlog_state', '0-1-11007595'
'gtid_current_pos', '0-1-11007595'
'gtid_domain_id', '0'
'gtid_ignore_duplicates', 'OFF'
'gtid_seq_no', '0'
'gtid_slave_pos', ''
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'have_compress', 'YES'
'have_crypt', 'YES'
'have_dynamic_loading', 'YES'
'have_geometry', 'YES'
'have_openssl', 'YES'
'have_profiling', 'YES'
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'have_symlink', 'DISABLED'
'histogram_size', '0'
'histogram_type', 'SINGLE_PREC_HB'
'host_cache_size', '228'
'hostname', 'dtd-db-01'
'identity', '0'
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'init_file', ''
'init_slave', ''
'innodb_adaptive_flushing', 'ON'
'innodb_adaptive_flushing_lwm', '10.000000'
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'innodb_buffer_pool_dump_pct', '25'
'innodb_buffer_pool_filename', 'ib_buffer_pool'
'innodb_buffer_pool_instances', '6'
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'innodb_buffer_pool_size', '12079595520'
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'innodb_defragment', 'ON'
'innodb_defragment_fill_factor', '0.900000'
'innodb_defragment_fill_factor_n_recs', '20'
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'innodb_encryption_rotation_iops', '100'
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'innodb_fast_shutdown', '1'
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'innodb_file_format', 'Barracuda'
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'innodb_file_per_table', 'ON'
'innodb_fill_factor', '100'
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'innodb_flush_log_at_trx_commit', '2'
'innodb_flush_method', 'O_DIRECT'
'innodb_flush_neighbors', '1'
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'innodb_ft_cache_size', '8000000'
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'log_slow_filter', 'admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk'
'log_slow_rate_limit', '1'
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'log_slow_verbosity', ''
'log_tc_size', '24576'
'log_warnings', '2'
'long_query_time', '10.000000'
'low_priority_updates', 'OFF'
'lower_case_file_system', 'OFF'
'lower_case_table_names', '0'
'master_verify_checksum', 'OFF'
'max_allowed_packet', '16777216'
'max_binlog_cache_size', '18446744073709547520'
'max_binlog_size', '1073741824'
'max_binlog_stmt_cache_size', '18446744073709547520'
'max_connect_errors', '10'
'max_connections', '100'
'max_delayed_threads', '20'
'max_digest_length', '1024'
'max_error_count', '64'
'max_heap_table_size', '134217728'
'max_insert_delayed_threads', '20'
'max_join_size', '18446744073709551615'
'max_length_for_sort_data', '1024'
'max_long_data_size', '16777216'
'max_prepared_stmt_count', '16382'
'max_recursive_iterations', '4294967295'
'max_relay_log_size', '1073741824'
'max_seeks_for_key', '4294967295'
'max_session_mem_used', '9223372036854775807'
'max_sort_length', '1024'
'max_sp_recursion_depth', '0'
'max_statement_time', '0.000000'
'max_tmp_tables', '32'
'max_user_connections', '0'
'max_write_lock_count', '4294967295'
'metadata_locks_cache_size', '1024'
'metadata_locks_hash_instances', '8'
'min_examined_row_limit', '0'
'mrr_buffer_size', '262144'
'multi_range_count', '256'
'myisam_block_size', '1024'
'myisam_data_pointer_size', '6'
'myisam_max_sort_file_size', '9223372036853727232'
'myisam_mmap_size', '18446744073709551615'
'myisam_recover_options', 'DEFAULT'
'myisam_repair_threads', '1'
'myisam_sort_buffer_size', '134216704'
'myisam_stats_method', 'NULLS_UNEQUAL'
'myisam_use_mmap', 'OFF'
'mysql56_temporal_format', 'ON'
'net_buffer_length', '16384'
'net_read_timeout', '30'
'net_retry_count', '10'
'net_write_timeout', '60'
'old', 'OFF'
'old_alter_table', 'OFF'
'old_mode', ''
'old_passwords', 'OFF'
'open_files_limit', '4233'
'optimizer_prune_level', '1'
'optimizer_search_depth', '62'
'optimizer_selectivity_sampling_limit', '100'
'optimizer_switch', 'index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on'
'optimizer_use_condition_selectivity', '1'
'performance_schema', 'OFF'
'performance_schema_accounts_size', '-1'
'performance_schema_digests_size', '-1'
'performance_schema_events_stages_history_long_size', '-1'
'performance_schema_events_stages_history_size', '-1'
'performance_schema_events_statements_history_long_size', '-1'
'performance_schema_events_statements_history_size', '-1'
'performance_schema_events_waits_history_long_size', '-1'
'performance_schema_events_waits_history_size', '-1'
'performance_schema_hosts_size', '-1'
'performance_schema_max_cond_classes', '80'
'performance_schema_max_cond_instances', '-1'
'performance_schema_max_digest_length', '1024'
'performance_schema_max_file_classes', '50'
'performance_schema_max_file_handles', '32768'
'performance_schema_max_file_instances', '-1'
'performance_schema_max_mutex_classes', '200'
'performance_schema_max_mutex_instances', '-1'
'performance_schema_max_rwlock_classes', '40'
'performance_schema_max_rwlock_instances', '-1'
'performance_schema_max_socket_classes', '10'
'performance_schema_max_socket_instances', '-1'
'performance_schema_max_stage_classes', '150'
'performance_schema_max_statement_classes', '188'
'performance_schema_max_table_handles', '-1'
'performance_schema_max_table_instances', '-1'
'performance_schema_max_thread_classes', '50'
'performance_schema_max_thread_instances', '-1'
'performance_schema_session_connect_attrs_size', '-1'
'performance_schema_setup_actors_size', '100'
'performance_schema_setup_objects_size', '100'
'performance_schema_users_size', '-1'
'pid_file', '/mnt/volume-01-part1/mysql/dtd-db-01.pid'
'plugin_dir', '/usr/lib64/mysql/plugin/'
'plugin_maturity', 'unknown'
'port', '3306'
'preload_buffer_size', '32768'
'profiling', 'OFF'
'profiling_history_size', '15'
'progress_report_time', '5'
'protocol_version', '10'
'proxy_user', ''
'pseudo_slave_mode', 'OFF'
'pseudo_thread_id', '4712'
'query_alloc_block_size', '16384'
'query_cache_limit', '2097152'
'query_cache_min_res_unit', '4096'
'query_cache_size', '134217728'
'query_cache_strip_comments', 'OFF'
'query_cache_type', 'ON'
'query_cache_wlock_invalidate', 'OFF'
'query_prealloc_size', '24576'
'rand_seed1', '289429692'
'rand_seed2', '778761261'
'range_alloc_block_size', '4096'
'read_binlog_speed_limit', '0'
'read_buffer_size', '131072'
'read_only', 'OFF'
'read_rnd_buffer_size', '262144'
'relay_log', ''
'relay_log_basename', ''
'relay_log_index', ''
'relay_log_info_file', 'relay-log.info'
'relay_log_purge', 'ON'
'relay_log_recovery', 'OFF'
'relay_log_space_limit', '0'
'replicate_annotate_row_events', 'ON'
'replicate_do_db', ''
'replicate_do_table', ''
'replicate_events_marked_for_skip', 'REPLICATE'
'replicate_ignore_db', ''
'replicate_ignore_table', ''
'replicate_wild_do_table', ''
'replicate_wild_ignore_table', ''
'report_host', ''
'report_password', ''
'report_port', '3306'
'report_user', ''
'rowid_merge_buff_size', '8388608'
'secure_auth', 'ON'
'secure_file_priv', ''
'server_id', '1'
'session_track_schema', 'ON'
'session_track_state_change', 'OFF'
'session_track_system_variables', ''
'session_track_transaction_info', 'OFF'
'skip_external_locking', 'ON'
'skip_name_resolve', 'ON'
'skip_networking', 'OFF'
'skip_parallel_replication', 'OFF'
'skip_replication', 'OFF'
'skip_show_database', 'OFF'
'slave_compressed_protocol', 'OFF'
'slave_ddl_exec_mode', 'IDEMPOTENT'
'slave_domain_parallel_threads', '0'
'slave_exec_mode', 'STRICT'
'slave_load_tmpdir', '/tmp'
'slave_max_allowed_packet', '1073741824'
'slave_net_timeout', '60'
'slave_parallel_max_queued', '131072'
'slave_parallel_mode', 'conservative'
'slave_parallel_threads', '0'
'slave_parallel_workers', '0'
'slave_run_triggers_for_rbr', 'NO'
'slave_skip_errors', 'OFF'
'slave_sql_verify_checksum', 'ON'
'slave_transaction_retries', '10'
'slave_type_conversions', ''
'slow_launch_time', '2'
'slow_query_log', 'OFF'
'slow_query_log_file', 'dtd-db-01-slow.log'
'socket', '/mnt/volume-01-part1/mysql/mysql.sock'
'sort_buffer_size', '2097152'
'sql_auto_is_null', 'OFF'
'sql_big_selects', 'ON'
'sql_buffer_result', 'OFF'
'sql_log_bin', 'ON'
'sql_log_off', 'OFF'
'sql_mode', 'STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'
'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_crl', ''
'ssl_crlpath', ''
'ssl_key', ''
'standard_compliant_cte', 'ON'
'storage_engine', 'MyISAM'
'stored_program_cache', '256'
'strict_password_validation', 'ON'
'sync_binlog', '0'
'sync_frm', 'ON'
'sync_master_info', '10000'
'sync_relay_log', '10000'
'sync_relay_log_info', '10000'
'system_time_zone', 'EDT'
'table_definition_cache', '400'
'table_open_cache', '2048'
'table_open_cache_instances', '8'
'thread_cache_size', '12'
'thread_concurrency', '12'
'thread_handling', 'one-thread-per-connection'
'thread_pool_idle_timeout', '60'
'thread_pool_max_threads', '65536'
'thread_pool_oversubscribe', '3'
'thread_pool_prio_kickup_timer', '1000'
'thread_pool_priority', 'auto'
'thread_pool_size', '6'
'thread_pool_stall_limit', '500'
'thread_stack', '196608'
'time_format', '%H:%i:%s'
'time_zone', 'SYSTEM'
'timed_mutexes', 'OFF'
'timestamp', '1562162811.946458'
'tmp_disk_table_size', '18446744073709551615'
'tmp_memory_table_size', '67108864'
'tmp_table_size', '67108864'
'tmpdir', '/tmp'
'transaction_alloc_block_size', '8192'
'transaction_prealloc_size', '4096'
'tx_isolation', 'REPEATABLE-READ'
'tx_read_only', 'OFF'
'unique_checks', 'ON'
'updatable_views_with_limit', 'YES'
'use_stat_tables', 'NEVER'
'userstat', 'OFF'
'version', '10.2.25-MariaDB-log'
'version_comment', 'MariaDB Server'
'version_compile_machine', 'x86_64'
'version_compile_os', 'Linux'
'version_malloc_library', 'system'
'version_ssl_library', 'OpenSSL 1.0.2k-fips 26 Jan 2017'
'wait_timeout', '28800'
'warning_count', '0'
'wsrep_osu_method', 'TOI'
'wsrep_auto_increment_control', 'ON'
'wsrep_causal_reads', 'OFF'
'wsrep_certification_rules', 'strict'
'wsrep_certify_nonpk', 'ON'
'wsrep_cluster_address', ''
'wsrep_cluster_name', 'my_wsrep_cluster'
'wsrep_convert_lock_to_trx', 'OFF'
'wsrep_data_home_dir', '/mnt/volume-01-part1/mysql/'
'wsrep_dbug_option', ''
'wsrep_debug', 'OFF'
'wsrep_desync', 'OFF'
'wsrep_dirty_reads', 'OFF'
'wsrep_drupal_282555_workaround', 'OFF'
'wsrep_forced_binlog_format', 'NONE'
'wsrep_gtid_domain_id', '0'
'wsrep_gtid_mode', 'OFF'
'wsrep_load_data_splitting', 'ON'
'wsrep_log_conflicts', 'OFF'
'wsrep_max_ws_rows', '0'
'wsrep_max_ws_size', '2147483647'
'wsrep_mysql_replication_bundle', '0'
'wsrep_node_address', ''
'wsrep_node_incoming_address', 'AUTO'
'wsrep_node_name', 'dtd-db-01'
'wsrep_notify_cmd', ''
'wsrep_on', 'OFF'
'wsrep_patch_version', 'wsrep_25.24'
'wsrep_provider', 'none'
'wsrep_provider_options', ''
'wsrep_recover', 'OFF'
'wsrep_reject_queries', 'NONE'
'wsrep_replicate_myisam', 'OFF'
'wsrep_restart_slave', 'OFF'
'wsrep_retry_autocommit', '1'
'wsrep_slave_fk_checks', 'ON'
'wsrep_slave_uk_checks', 'OFF'
'wsrep_slave_threads', '1'
'wsrep_sst_auth', ''
'wsrep_sst_donor', ''
'wsrep_sst_donor_rejects_queries', 'OFF'
'wsrep_sst_method', 'rsync'
'wsrep_sst_receive_address', 'AUTO'
'wsrep_start_position', '00000000-0000-0000-0000-000000000000:-1'
'wsrep_sync_wait', '0'
'aria\u block\u size'，'8192'
“aria_检查点间隔”，“30”
“aria_检查点_日志_活动”，“1048576”
“aria\u encrypt\u tables”“关闭”
'aria\u恢复失败后强制\u启动\u'，'0'
“aria\u group\u commit”，“无”
“aria\u组\u提交\u间隔”，“0”
'aria_日志_文件_大小'，'1073741824'
“aria\u log\u purge\u type”、“立即”
“aria_max_sort_file_size”，“9223372036853727232”
“aria_page_checksum”，“ON”
“aria_pagecache_age_阈值”，“300”
“aria_pagecache_buffer_size”，“134217728”
“咏叹调页面缓存分区限制”，“100”
“aria\u页面缓存\u文件\u哈希\u大小”，“512”
“aria\u恢复选项”，“备份，快速”
“aria_修复_线程”，“1”
‘aria_排序_缓冲区_大小’，‘268434432’
“aria_stats_method”，“nulls_”
'aria\u sync\u log\u dir'，'NEWFILE'
“aria_用于_temp_表”，“打开”
'自动增量'，'1'
“自动增量偏移”，“1”
“自动提交”，“打开”
“自动sp权限”，“打开”
'倒木'，'50'
“basedir”，“/usr/”
“大桌子”，“关”
“binlog\u注释\u行\u事件”，“打开”
“binlog\u缓存大小”，“31457280”
“binlog_校验和”，“CRC32”
'binlog\u commit\u wait\u count'，'0'
“binlog\u commit\u wait\u usec”，“100000”
“binlog\u直接\u非事务性\u更新”，“关闭”
“binlog_格式”、“混合”
“binlog\u优化线程\u调度”，“打开”
“binlog\u行\u图像”，“完整”
“binlog\u stmt\u缓存大小”，“32768”
“批量插入缓冲区大小”，“8388608”
'字符集\客户端'，'utf8'
“字符集连接”，“utf8”
“字符集数据库”，“utf8”
“字符集文件系统”，“二进制”
“字符集结果”，“utf8”
“字符集服务器”，“拉丁1”
“字符集系统”，“utf8”
'字符集\目录'，'/usr/share/mysql/charsets/'
“检查约束检查”，“打开”
“排序规则\u连接”，“utf8\u常规\u ci”
“排序规则\u数据库”、“utf8\u常规\u ci”
'排序规则\u服务器'，'拉丁语\u瑞典语\u ci'
“完成类型”，“无链”
“并发插入”，“自动”
“连接超时”，“10”
“核心文件”，“关闭”
“datadir”，“/mnt/volume-01-part1/mysql/”
“日期格式”，“%Y-%m-%d”
“日期时间格式”，“%Y-%m-%d%H:%i:%s”
“死锁搜索深度长”，“15”
'死锁\搜索\深度\短'，'4'
“死锁超时时间长”，“50000000”
“死锁\u超时\u短”，“10000”
'调试\u无\u线程\u报警'，'关闭'
'默认\u主\u连接'，'
'默认正则表达式标志'，''
“默认存储引擎”，“MyISAM”
'默认\u tmp\u存储\u引擎'，'
“默认周格式”，“0”
“延迟键写入”，“打开”
“延迟插入限制”，“100”
“延迟插入超时”，“300”
“延迟队列大小”，“1000”
“div\u精度增量”，“4”
“加密\u binlog”，“关闭”
“加密\u tmp\u磁盘\u表”，“关闭”
“加密tmp文件”，“关闭”
“强制执行存储引擎”
“均衡范围指数下降极限”，“0”
'错误\u计数'，'0'
“事件调度程序”，“关闭”
“昂贵的子查询限制”，“100”
'过期天数'，'3'
'explicit\u defaults\u for\u timestamp'，'OFF'
“外部用户”
“额外的最大连接数”，“1”
“额外端口”，“0”
“冲洗”，“关闭”
“刷新时间”，“0”
“外键检查”，“打开”
“ft_boolean_syntax”，“+->观察结果：
Acl_users = 5
Com_show_fields = 0
Com_show_tables = 0
Handler_read_rnd_next / Handler_read_rnd = 6.13
Innodb_buffer_pool_write_requests / Innodb_buffer_pool_pages_flushed = 2.12
Key_blocks_used = 0
Key_read_requests = 0
Table_locks_immediate = 6.5 /HR
eq_range_index_dive_limit = 0 (always use index dives)
innodb_log_block_size = 0 (Deprecated as of MariaDB 10.2.6)
innodb_max_bitmap_file_size = 0
innodb_max_changed_pages = 0
innodb_mirrored_log_groups = 0
innodb_sched_priority_cleaner = 0
innodb_show_locks_held = 0
lock_wait_timeout = 86,400
((query_cache_size - Qcache_free_memory) / Qcache_queries_in_cache) / query_cache_min_res_unit = 6.67
(query_cache_size - Qcache_free_memory) / Qcache_queries_in_cache = 27,332
Aria_pagecache_writes = 11 /sec
Com_create_temporary_table = 0.65 /HR
Com_load = 0.65 /HR
Innodb_buffer_pool_bytes_data = 816674 /sec
Qcache_total_blocks * query_cache_min_res_unit / Qcache_queries_in_cache = 157,586
binlog_cache_size = 3.15e+7
group_concat_max_len = 1.05e+6
innodb_adaptive_hash_index_partitions = 8
innodb_background_scrub_data_check_interval = 0.33 /sec
innodb_background_scrub_data_interval = 55 /sec
max_relay_log_size = 1024MB
thread_concurrency = 12
binlog_annotate_row_events = ON
ft_boolean_syntax = + -><()~*:\"\"&
innodb_corrupt_table_action = deprecated
innodb_defragment = ON
innodb_fast_shutdown = 1
innodb_locking_fake_changes = OFF
innodb_use_atomic_writes = ON
innodb_use_global_flush_log_at_trx_commit = OFF
innodb_use_trim = ON
log_slow_admin_statements = ON
log_slow_slave_statements = ON
myisam_stats_method = NULLS_UNEQUAL
opt_s__engine_condition_pushdown = off
opt_s__orderby_uses_equalities = on
replicate_annotate_row_events = ON
session_track_system_variables =
- 版本：10.2.25-MariaDB-log
- 16GB内存
- 正常运行时间=03:04:23；请在几个小时后重新运行“显示全局状态”
- 您没有在Windows上运行
- 运行64位版本
- 您似乎正在完全（或大部分）运行InnoDB
更重要的问题：
Acl_users = 5
Com_show_fields = 0
Com_show_tables = 0
Handler_read_rnd_next / Handler_read_rnd = 6.13
Innodb_buffer_pool_write_requests / Innodb_buffer_pool_pages_flushed = 2.12
Key_blocks_used = 0
Key_read_requests = 0
Table_locks_immediate = 6.5 /HR
eq_range_index_dive_limit = 0 (always use index dives)
innodb_log_block_size = 0 (Deprecated as of MariaDB 10.2.6)
innodb_max_bitmap_file_size = 0
innodb_max_changed_pages = 0
innodb_mirrored_log_groups = 0
innodb_sched_priority_cleaner = 0
innodb_show_locks_held = 0
lock_wait_timeout = 86,400
((query_cache_size - Qcache_free_memory) / Qcache_queries_in_cache) / query_cache_min_res_unit = 6.67
(query_cache_size - Qcache_free_memory) / Qcache_queries_in_cache = 27,332
Aria_pagecache_writes = 11 /sec
Com_create_temporary_table = 0.65 /HR
Com_load = 0.65 /HR
Innodb_buffer_pool_bytes_data = 816674 /sec
Qcache_total_blocks * query_cache_min_res_unit / Qcache_queries_in_cache = 157,586
binlog_cache_size = 3.15e+7
group_concat_max_len = 1.05e+6
innodb_adaptive_hash_index_partitions = 8
innodb_background_scrub_data_check_interval = 0.33 /sec
innodb_background_scrub_data_interval = 55 /sec
max_relay_log_size = 1024MB
thread_concurrency = 12
binlog_annotate_row_events = ON
ft_boolean_syntax = + -><()~*:\"\"&
innodb_corrupt_table_action = deprecated
innodb_defragment = ON
innodb_fast_shutdown = 1
innodb_locking_fake_changes = OFF
innodb_use_atomic_writes = ON
innodb_use_global_flush_log_at_trx_commit = OFF
innodb_use_trim = ON
log_slow_admin_statements = ON
log_slow_slave_statements = ON
myisam_stats_method = NULLS_UNEQUAL
opt_s__engine_condition_pushdown = off
opt_s__orderby_uses_equalities = on
replicate_annotate_row_events = ON
session_track_system_variables =
binlog_缓存_大小高得危险--从30M更改为1M
建议使用slowlog；看
详细信息和其他观察结果：
Acl_users = 5
Com_show_fields = 0
Com_show_tables = 0
Handler_read_rnd_next / Handler_read_rnd = 6.13
Innodb_buffer_pool_write_requests / Innodb_buffer_pool_pages_flushed = 2.12
Key_blocks_used = 0
Key_read_requests = 0
Table_locks_immediate = 6.5 /HR
eq_range_index_dive_limit = 0 (always use index dives)
innodb_log_block_size = 0 (Deprecated as of MariaDB 10.2.6)
innodb_max_bitmap_file_size = 0
innodb_max_changed_pages = 0
innodb_mirrored_log_groups = 0
innodb_sched_priority_cleaner = 0
innodb_show_locks_held = 0
lock_wait_timeout = 86,400
((query_cache_size - Qcache_free_memory) / Qcache_queries_in_cache) / query_cache_min_res_unit = 6.67
(query_cache_size - Qcache_free_memory) / Qcache_queries_in_cache = 27,332
Aria_pagecache_writes = 11 /sec
Com_create_temporary_table = 0.65 /HR
Com_load = 0.65 /HR
Innodb_buffer_pool_bytes_data = 816674 /sec
Qcache_total_blocks * query_cache_min_res_unit / Qcache_queries_in_cache = 157,586
binlog_cache_size = 3.15e+7
group_concat_max_len = 1.05e+6
innodb_adaptive_hash_index_partitions = 8
innodb_background_scrub_data_check_interval = 0.33 /sec
innodb_background_scrub_data_interval = 55 /sec
max_relay_log_size = 1024MB
thread_concurrency = 12
binlog_annotate_row_events = ON
ft_boolean_syntax = + -><()~*:\"\"&
innodb_corrupt_table_action = deprecated
innodb_defragment = ON
innodb_fast_shutdown = 1
innodb_locking_fake_changes = OFF
innodb_use_atomic_writes = ON
innodb_use_global_flush_log_at_trx_commit = OFF
innodb_use_trim = ON
log_slow_admin_statements = ON
log_slow_slave_statements = ON
myisam_stats_method = NULLS_UNEQUAL
opt_s__engine_condition_pushdown = off
opt_s__orderby_uses_equalities = on
replicate_annotate_row_events = ON
session_track_system_variables =
（binlog\u cache\u size*max\u connections/\u ram）=30M*100/16384M=18.3%
——用于缓存到binlog的事务的ram。
--减少binlog\u缓存大小和/或最大连接数
（innodb\u lru\u扫描深度*innodb\u页面清理器）=512*4=2048
——页面清理器每秒的工作量。
——“NYNDB：PGEAGER吸尘器：1000毫微米预期的环路……”可以通过降低LRU扫描深度来固定：考虑1000 /NYNDBAL PGAGE清洗剂< /P>
（innodb页面清理器/innodb缓冲池实例）=4/6=0.667
——innodb页面清理器
--建议将innodb_页面_清理器设置为innodb_缓冲区_池_实例
（Innodb_buffer_pool_pages_free/Innodb_buffer_pool_pages_total）=181655/737235=24.6%
——当前未使用的缓冲池的Pct
--innodb_缓冲区_池_大小是否大于所需
（Innodb页面写入/Innodb缓冲区池写入请求）=33499/70858=47.3%
——必须命中磁盘的写入请求
--检查innodb\u缓冲区\u池\u大小
（正常运行时间/60*innodb_log_file_size/innodb_os_log_writed）=11063/60*3072M/24557056=24186
——从5.6.8开始的innodb日志旋转间隔分钟，可以动态更改；请务必同时更改my.cnf。
--（旋转间隔60分钟的建议有些随意。）调整innodb_log_file_大小。（无法在AWS中更改。）
（默认的存储引擎）=默认的存储引擎=
（innodb_flush_neights）=1
——将块写入磁盘时的一个小优化。
--SSD驱动器使用0；1个硬盘驱动器
（innodb\u io\u容量）=200
——磁盘上每秒可执行I/O操作。100用于低速驱动器；200个用于旋转驱动；策略性污水排放计划为1000-2000；乘以RAID因子
（sync\u binlog）=0
——在某些情况下，使用1增加安全性