编辑＃2：我现在尝试了两个MariaDB数据库，一个MySQL和一个Percona，只有MariaDB实例正在锁定。
我在远程服务器上使用MariadB（版本5.5.56）时遇到此锁定等待超时问题，而我在本地MySQL（版本5.5.57）实例上没有这个问题。我知道这是因为我导出了远程数据库，然后在本地导入它，问题就消失了。
可以肯定的是，查询非常大。我们只是说它是一个非常大的选择查询，有大量的左内连接（见下文）。
我已经尝试将远程my.cnf文件设置为几乎与我的本地服务器相同，但运行SHOW VARIABLES;有一个很大的区别，我真的不想通过差异（如下所示） ） 逐行。
我只是想知道是否有人知道从哪里开始？我已经尝试了一些像the ones posted here这样的建议而没有任何运气。
如果有人认为最简单的事情就是尝试升级到MariadB 10.x，那么我就可以试一试。
感谢。
编辑：附加Diff和SQL查询
SQL查询
SELECT commerce_product.product_id AS product_id, commerce_product.sku AS commerce_product_sku, taxonomy_term_data_field_data_field_sample_name.name AS taxonomy_term_data_field_data_field_sample_name_name, taxonomy_term_data_field_data_field_sample_name.vid AS taxonomy_term_data_field_data_field_sample_name_vid, taxonomy_term_data_field_data_field_sample_name.tid AS taxonomy_term_data_field_data_field_sample_name_tid, taxonomy_term_data_field_data_field_sample_name__taxonomy_vocabulary.machine_name AS taxonomy_term_data_field_data_field_sample_name__taxonomy_vo, taxonomy_term_data_field_data_field_sample_origin.name AS taxonomy_term_data_field_data_field_sample_origin_name, taxonomy_term_data_field_data_field_sample_origin.vid AS taxonomy_term_data_field_data_field_sample_origin_vid, taxonomy_term_data_field_data_field_sample_origin.tid AS taxonomy_term_data_field_data_field_sample_origin_tid, taxonomy_term_data_field_data_field_sample_origin__taxonomy_vocabulary.machine_name AS taxonomy_term_data_field_data_field_sample_origin__taxonomy_, taxonomy_term_data_field_data_field_sample_matrix.name AS taxonomy_term_data_field_data_field_sample_matrix_name, taxonomy_term_data_field_data_field_sample_matrix.vid AS taxonomy_term_data_field_data_field_sample_matrix_vid, taxonomy_term_data_field_data_field_sample_matrix.tid AS taxonomy_term_data_field_data_field_sample_matrix_tid, taxonomy_term_data_field_data_field_sample_matrix__taxonomy_vocabulary.machine_name AS taxonomy_term_data_field_data_field_sample_matrix__taxonomy_, taxonomy_term_data_field_data_field_sample_volume.name AS taxonomy_term_data_field_data_field_sample_volume_name, taxonomy_term_data_field_data_field_sample_volume.vid AS taxonomy_term_data_field_data_field_sample_volume_vid, taxonomy_term_data_field_data_field_sample_volume.tid AS taxonomy_term_data_field_data_field_sample_volume_tid, taxonomy_term_data_field_data_field_sample_volume__taxonomy_vocabulary.machine_name AS taxonomy_term_data_field_data_field_sample_volume__taxonomy_, 'commerce_product' AS field_data_title_field_commerce_product_entity_type, 'commerce_product' AS field_data_commerce_stock_commerce_product_entity_type, 'commerce_product' AS field_data_field_minimum_order_commerce_product_entity_type, 'commerce_product' AS field_data_commerce_price_commerce_product_entity_type, 'commerce_product' AS field_data_field_sample_patient_age_commerce_product_entity_, 'commerce_product' AS field_data_field_sample_patient_gender_commerce_product_enti, 'commerce_product' AS field_data_field_sample_patient_ethnicity_commerce_product_e, 'commerce_product' AS field_data_field_measurement_commerce_product_entity_type, 'commerce_product' AS field_data_field_unit_of_measure_commerce_product_entity_typ, 'commerce_product' AS field_data_field_icd10_code_commerce_product_entity_type, 'commerce_product' AS field_data_field_sample_storage_temp_commerce_product_entity, 'commerce_product' AS field_data_field_sample_date_commerce_product_entity_type, 'commerce_product' AS field_data_field_sample_test_1_commerce_product_entity_type, 'commerce_product' AS field_data_field_sample_test_data_1_commerce_product_entity_, 'commerce_product' AS field_data_field_sample_detail_1_commerce_product_entity_typ, 'commerce_product' AS field_data_field_sample_test_2_commerce_product_entity_type, 'commerce_product' AS field_data_field_sample_test_data_2_commerce_product_entity_, 'commerce_product' AS field_data_field_sample_detail_2_commerce_product_entity_typ, 'commerce_product' AS field_data_field_sample_test_3_commerce_product_entity_type, 'commerce_product' AS field_data_field_sample_test_data_3_commerce_product_entity_, 'commerce_product' AS field_data_field_sample_detail_3_commerce_product_entity_typ, 'commerce_product' AS field_data_field_pdf_commerce_product_entity_type, 'commerce_product' AS field_data_field_additional_information_1_commerce_product_e, 'commerce_product' AS field_data_field_additional_data_1_commerce_product_entity_t, 'commerce_product' AS field_data_field_additional_detail_1_commerce_product_entity, 'commerce_product' AS field_data_field_additional_information_2_commerce_product_e, 'commerce_product' AS field_data_field_additional_data_2_commerce_product_entity_t, 'commerce_product' AS field_data_field_additional_detail_2_commerce_product_entity, 'commerce_product' AS field_data_field_additional_information_3_commerce_product_e, 'commerce_product' AS field_data_field_additional_data_3_commerce_product_entity_t, 'commerce_product' AS field_data_field_additional_detail_3_commerce_product_entity, 'commerce_product' AS field_data_field_additional_information_4_commerce_product_e, 'commerce_product' AS field_data_field_additional_data_4_commerce_product_entity_t, 'commerce_product' AS field_data_field_additional_detail_4_commerce_product_entity, 'commerce_product' AS field_data_field_additional_information_5_commerce_product_e, 'commerce_product' AS field_data_field_additional_data_5_commerce_product_entity_t, 'commerce_product' AS field_data_field_additional_detail_5_commerce_product_entity, 'commerce_product' AS field_data_field_additional_information_6_commerce_product_e, 'commerce_product' AS field_data_field_additional_data_6_commerce_product_entity_t, 'commerce_product' AS field_data_field_additional_detail_6_commerce_product_entity, 'commerce_product' AS field_data_field_additional_information_7_commerce_product_e, 'commerce_product' AS field_data_field_additional_data_7_commerce_product_entity_t, 'commerce_product' AS field_data_field_additional_detail_7_commerce_product_entity, 'commerce_product' AS field_data_field_sample_matrix_commerce_product_entity_type, 'commerce_product' AS field_data_field_sample_origin_commerce_product_entity_type
FROM
{commerce_product} commerce_product
LEFT JOIN {field_data_field_sample_category} field_data_field_sample_category ON commerce_product.product_id = field_data_field_sample_category.entity_id AND (field_data_field_sample_category.entity_type = 'commerce_product' AND field_data_field_sample_category.deleted = '0')
INNER JOIN {taxonomy_term_data} taxonomy_term_data_field_data_field_sample_category ON field_data_field_sample_category.field_sample_category_tid = taxonomy_term_data_field_data_field_sample_category.tid
LEFT JOIN {field_data_field_sample_name} field_data_field_sample_name ON commerce_product.product_id = field_data_field_sample_name.entity_id AND (field_data_field_sample_name.entity_type = 'commerce_product' AND field_data_field_sample_name.deleted = '0')
INNER JOIN {taxonomy_term_data} taxonomy_term_data_field_data_field_sample_name ON field_data_field_sample_name.field_sample_name_tid = taxonomy_term_data_field_data_field_sample_name.tid
LEFT JOIN {field_data_field_sample_matrix} field_data_field_sample_matrix ON commerce_product.product_id = field_data_field_sample_matrix.entity_id AND (field_data_field_sample_matrix.entity_type = 'commerce_product' AND field_data_field_sample_matrix.deleted = '0')
LEFT JOIN {taxonomy_term_data} taxonomy_term_data_field_data_field_sample_matrix ON field_data_field_sample_matrix.field_sample_matrix_tid = taxonomy_term_data_field_data_field_sample_matrix.tid
LEFT JOIN {field_data_field_sample_origin} field_data_field_sample_origin ON commerce_product.product_id = field_data_field_sample_origin.entity_id AND (field_data_field_sample_origin.entity_type = 'commerce_product' AND field_data_field_sample_origin.deleted = '0')
LEFT JOIN {taxonomy_term_data} taxonomy_term_data_field_data_field_sample_origin ON field_data_field_sample_origin.field_sample_origin_tid = taxonomy_term_data_field_data_field_sample_origin.tid
LEFT JOIN {field_data_field_sample_volume} field_data_field_sample_volume ON commerce_product.product_id = field_data_field_sample_volume.entity_id AND (field_data_field_sample_volume.entity_type = 'commerce_product' AND field_data_field_sample_volume.deleted = '0')
LEFT JOIN {taxonomy_term_data} taxonomy_term_data_field_data_field_sample_volume ON field_data_field_sample_volume.field_sample_volume_tid = taxonomy_term_data_field_data_field_sample_volume.tid
LEFT JOIN {field_data_commerce_stock} field_data_commerce_stock ON commerce_product.product_id = field_data_commerce_stock.entity_id AND (field_data_commerce_stock.entity_type = 'commerce_product' AND field_data_commerce_stock.deleted = '0')
INNER JOIN {field_data_field_qc_sample_verified} field_data_field_qc_sample_verified ON commerce_product.product_id = field_data_field_qc_sample_verified.entity_id AND (field_data_field_qc_sample_verified.entity_type = 'commerce_product' AND field_data_field_qc_sample_verified.deleted = '0')
LEFT JOIN {field_data_field_sample_results} field_data_field_sample_results ON commerce_product.product_id = field_data_field_sample_results.entity_id AND (field_data_field_sample_results.entity_type = 'commerce_product' AND field_data_field_sample_results.deleted = '0')
LEFT JOIN {field_data_field_sample_detail_1} field_data_field_sample_detail_1 ON commerce_product.product_id = field_data_field_sample_detail_1.entity_id AND (field_data_field_sample_detail_1.entity_type = 'commerce_product' AND field_data_field_sample_detail_1.deleted = '0')
LEFT JOIN {field_data_field_sample_detail_2} field_data_field_sample_detail_2 ON commerce_product.product_id = field_data_field_sample_detail_2.entity_id AND (field_data_field_sample_detail_2.entity_type = 'commerce_product' AND field_data_field_sample_detail_2.deleted = '0')
LEFT JOIN {field_data_field_sample_detail_3} field_data_field_sample_detail_3 ON commerce_product.product_id = field_data_field_sample_detail_3.entity_id AND (field_data_field_sample_detail_3.entity_type = 'commerce_product' AND field_data_field_sample_detail_3.deleted = '0')
LEFT JOIN {field_data_field_sample_test_1} field_data_field_sample_test_1 ON commerce_product.product_id = field_data_field_sample_test_1.entity_id AND (field_data_field_sample_test_1.entity_type = 'commerce_product' AND field_data_field_sample_test_1.deleted = '0')
LEFT JOIN {field_data_field_sample_test_2} field_data_field_sample_test_2 ON commerce_product.product_id = field_data_field_sample_test_2.entity_id AND (field_data_field_sample_test_2.entity_type = 'commerce_product' AND field_data_field_sample_test_2.deleted = '0')
LEFT JOIN {field_data_field_sample_test_3} field_data_field_sample_test_3 ON commerce_product.product_id = field_data_field_sample_test_3.entity_id AND (field_data_field_sample_test_3.entity_type = 'commerce_product' AND field_data_field_sample_test_3.deleted = '0')
LEFT JOIN {field_data_field_sample_test_data_1} field_data_field_sample_test_data_1 ON commerce_product.product_id = field_data_field_sample_test_data_1.entity_id AND (field_data_field_sample_test_data_1.entity_type = 'commerce_product' AND field_data_field_sample_test_data_1.deleted = '0')
LEFT JOIN {field_data_field_sample_test_data_2} field_data_field_sample_test_data_2 ON commerce_product.product_id = field_data_field_sample_test_data_2.entity_id AND (field_data_field_sample_test_data_2.entity_type = 'commerce_product' AND field_data_field_sample_test_data_2.deleted = '0')
LEFT JOIN {field_data_field_sample_test_data_3} field_data_field_sample_test_data_3 ON commerce_product.product_id = field_data_field_sample_test_data_3.entity_id AND (field_data_field_sample_test_data_3.entity_type = 'commerce_product' AND field_data_field_sample_test_data_3.deleted = '0')
LEFT JOIN {field_data_field_additional_detail_1} field_data_field_additional_detail_1 ON commerce_product.product_id = field_data_field_additional_detail_1.entity_id AND (field_data_field_additional_detail_1.entity_type = 'commerce_product' AND field_data_field_additional_detail_1.deleted = '0')
LEFT JOIN {field_data_field_additional_detail_2} field_data_field_additional_detail_2 ON commerce_product.product_id = field_data_field_additional_detail_2.entity_id AND (field_data_field_additional_detail_2.entity_type = 'commerce_product' AND field_data_field_additional_detail_2.deleted = '0')
LEFT JOIN {field_data_field_additional_detail_3} field_data_field_additional_detail_3 ON commerce_product.product_id = field_data_field_additional_detail_3.entity_id AND (field_data_field_additional_detail_3.entity_type = 'commerce_product' AND field_data_field_additional_detail_3.deleted = '0')
LEFT JOIN {field_data_field_additional_detail_4} field_data_field_additional_detail_4 ON commerce_product.product_id = field_data_field_additional_detail_4.entity_id AND (field_data_field_additional_detail_4.entity_type = 'commerce_product' AND field_data_field_additional_detail_4.deleted = '0')
LEFT JOIN {field_data_field_additional_detail_5} field_data_field_additional_detail_5 ON commerce_product.product_id = field_data_field_additional_detail_5.entity_id AND (field_data_field_additional_detail_5.entity_type = 'commerce_product' AND field_data_field_additional_detail_5.deleted = '0')
LEFT JOIN {field_data_field_additional_detail_6} field_data_field_additional_detail_6 ON commerce_product.product_id = field_data_field_additional_detail_6.entity_id AND (field_data_field_additional_detail_6.entity_type = 'commerce_product' AND field_data_field_additional_detail_6.deleted = '0')
LEFT JOIN {field_data_field_additional_detail_7} field_data_field_additional_detail_7 ON commerce_product.product_id = field_data_field_additional_detail_7.entity_id AND (field_data_field_additional_detail_7.entity_type = 'commerce_product' AND field_data_field_additional_detail_7.deleted = '0')
LEFT JOIN {field_data_field_additional_data_1} field_data_field_additional_data_1 ON commerce_product.product_id = field_data_field_additional_data_1.entity_id AND (field_data_field_additional_data_1.entity_type = 'commerce_product' AND field_data_field_additional_data_1.deleted = '0')
LEFT JOIN {field_data_field_additional_data_2} field_data_field_additional_data_2 ON commerce_product.product_id = field_data_field_additional_data_2.entity_id AND (field_data_field_additional_data_2.entity_type = 'commerce_product' AND field_data_field_additional_data_2.deleted = '0')
LEFT JOIN {field_data_field_additional_data_3} field_data_field_additional_data_3 ON commerce_product.product_id = field_data_field_additional_data_3.entity_id AND (field_data_field_additional_data_3.entity_type = 'commerce_product' AND field_data_field_additional_data_3.deleted = '0')
LEFT JOIN {field_data_field_additional_data_4} field_data_field_additional_data_4 ON commerce_product.product_id = field_data_field_additional_data_4.entity_id AND (field_data_field_additional_data_4.entity_type = 'commerce_product' AND field_data_field_additional_data_4.deleted = '0')
LEFT JOIN {field_data_field_additional_data_5} field_data_field_additional_data_5 ON commerce_product.product_id = field_data_field_additional_data_5.entity_id AND (field_data_field_additional_data_5.entity_type = 'commerce_product' AND field_data_field_additional_data_5.deleted = '0')
LEFT JOIN {field_data_field_additional_data_6} field_data_field_additional_data_6 ON commerce_product.product_id = field_data_field_additional_data_6.entity_id AND (field_data_field_additional_data_6.entity_type = 'commerce_product' AND field_data_field_additional_data_6.deleted = '0')
LEFT JOIN {field_data_field_additional_data_7} field_data_field_additional_data_7 ON commerce_product.product_id = field_data_field_additional_data_7.entity_id AND (field_data_field_additional_data_7.entity_type = 'commerce_product' AND field_data_field_additional_data_7.deleted = '0')
LEFT JOIN {field_data_field_additional_information_1} field_data_field_additional_information_1 ON commerce_product.product_id = field_data_field_additional_information_1.entity_id AND (field_data_field_additional_information_1.entity_type = 'commerce_product' AND field_data_field_additional_information_1.deleted = '0')
LEFT JOIN {field_data_field_additional_information_2} field_data_field_additional_information_2 ON commerce_product.product_id = field_data_field_additional_information_2.entity_id AND (field_data_field_additional_information_2.entity_type = 'commerce_product' AND field_data_field_additional_information_2.deleted = '0')
LEFT JOIN {field_data_field_additional_information_3} field_data_field_additional_information_3 ON commerce_product.product_id = field_data_field_additional_information_3.entity_id AND (field_data_field_additional_information_3.entity_type = 'commerce_product' AND field_data_field_additional_information_3.deleted = '0')
LEFT JOIN {field_data_field_additional_information_4} field_data_field_additional_information_4 ON commerce_product.product_id = field_data_field_additional_information_4.entity_id AND (field_data_field_additional_information_4.entity_type = 'commerce_product' AND field_data_field_additional_information_4.deleted = '0')
LEFT JOIN {field_data_field_additional_information_5} field_data_field_additional_information_5 ON commerce_product.product_id = field_data_field_additional_information_5.entity_id AND (field_data_field_additional_information_5.entity_type = 'commerce_product' AND field_data_field_additional_information_5.deleted = '0')
LEFT JOIN {field_data_field_additional_information_6} field_data_field_additional_information_6 ON commerce_product.product_id = field_data_field_additional_information_6.entity_id AND (field_data_field_additional_information_6.entity_type = 'commerce_product' AND field_data_field_additional_information_6.deleted = '0')
LEFT JOIN {field_data_field_additional_information_7} field_data_field_additional_information_7 ON commerce_product.product_id = field_data_field_additional_information_7.entity_id AND (field_data_field_additional_information_7.entity_type = 'commerce_product' AND field_data_field_additional_information_7.deleted = '0')
LEFT JOIN {taxonomy_vocabulary} taxonomy_term_data_field_data_field_sample_name__taxonomy_vocabulary ON taxonomy_term_data_field_data_field_sample_name.vid = taxonomy_term_data_field_data_field_sample_name__taxonomy_vocabulary.vid
LEFT JOIN {taxonomy_vocabulary} taxonomy_term_data_field_data_field_sample_origin__taxonomy_vocabulary ON taxonomy_term_data_field_data_field_sample_origin.vid = taxonomy_term_data_field_data_field_sample_origin__taxonomy_vocabulary.vid
LEFT JOIN {taxonomy_vocabulary} taxonomy_term_data_field_data_field_sample_matrix__taxonomy_vocabulary ON taxonomy_term_data_field_data_field_sample_matrix.vid = taxonomy_term_data_field_data_field_sample_matrix__taxonomy_vocabulary.vid
LEFT JOIN {taxonomy_vocabulary} taxonomy_term_data_field_data_field_sample_volume__taxonomy_vocabulary ON taxonomy_term_data_field_data_field_sample_volume.vid = taxonomy_term_data_field_data_field_sample_volume__taxonomy_vocabulary.vid
WHERE (( (taxonomy_term_data_field_data_field_sample_category.tid = '1510' ) AND (taxonomy_term_data_field_data_field_sample_name.tid = '1001' ) )AND(( (commerce_product.status <> '0') AND (field_data_commerce_stock.commerce_stock_value > '0') AND (field_data_field_qc_sample_verified.field_qc_sample_verified_value = '1') )))
ORDER BY commerce_product_sku DESC
变量差异
"> = MariadB"
"< = MySQL"
> | aria_block_size | 8192|
> | aria_checkpoint_interval| 30|
> | aria_checkpoint_log_activity| 1048576 |
> | aria_force_start_after_recovery_failures| 0 |
> | aria_group_commit | none|
> | aria_group_commit_interval| 0 |
> | aria_log_file_size| 1073741824|
> | aria_log_purge_type | immediate |
> | aria_max_sort_file_size | 9223372036853727232 |
> | aria_page_checksum| ON|
> | aria_pagecache_age_threshold| 300 |
> | aria_pagecache_buffer_size| 134217728 |
> | aria_pagecache_division_limit | 100 |
> | aria_recover| NORMAL|
> | aria_repair_threads | 1 |
> | aria_sort_buffer_size | 134217728 |
> | aria_stats_method | nulls_unequal |
> | aria_sync_log_dir | NEWFILE |
> | aria_used_for_temp_tables | ON|
> | binlog_annotate_row_events| OFF |
> | binlog_checksum | NONE|
> | binlog_optimize_thread_scheduling | ON|
< | character_set_database| latin1 |
> | character_set_database| utf8|
< | collation_database| latin1_swedish_ci|
> | collation_database| utf8_general_ci |
> | deadlock_search_depth_long| 15|
> | deadlock_search_depth_short | 4 |
> | deadlock_timeout_long | 50000000|
> | deadlock_timeout_short| 10000 |
> | debug_no_thread_alarm | OFF |
< | engine_condition_pushdown | ON |
> | engine_condition_pushdown | OFF |
< | expire_logs_days| 10 |
> | expensive_subquery_limit| 100 |
> | expire_logs_days| 0 |
> | extra_max_connections | 1 |
> | extra_port| 0 |
< | have_symlink| YES|
> | have_symlink| DISABLED|
> | ignore_db_dirs| |
> | in_transaction| 0 |
> | innodb_adaptive_flushing_method | estimate|
> | innodb_adaptive_hash_index_partitions | 1 |
> | innodb_blocking_buffer_pool_restore | OFF |
> | innodb_buffer_pool_populate | OFF |
> | innodb_buffer_pool_restore_at_startup | 0 |
> | innodb_buffer_pool_shm_checksum | ON|
> | innodb_buffer_pool_shm_key| 0 |
> | innodb_checkpoint_age_target| 0 |
> | innodb_corrupt_table_action | assert|
> | innodb_dict_size_limit| 0 |
> | innodb_doublewrite_file | |
> | innodb_fake_changes | OFF |
> | innodb_fast_checksum| OFF |
< | innodb_flush_log_at_trx_commit| 1|
> | innodb_flush_log_at_trx_commit| 2 |
> | innodb_flush_neighbor_pages | area|
> | innodb_ibuf_accel_rate| 100 |
> | innodb_ibuf_active_contract | 1 |
> | innodb_ibuf_max_size| 67092480|
> | innodb_import_table_from_xtrabackup | 0 |
> | innodb_kill_idle_transaction| 0 |
< | innodb_lock_wait_timeout| 50 |
> | innodb_lazy_drop_table| 0 |
> | innodb_lock_wait_timeout| 180 |
> | innodb_locking_fake_changes | ON|
> | innodb_log_block_size | 512 |
> | innodb_max_bitmap_file_size | 104857600 |
> | innodb_max_changed_pages| 1000000 |
> | innodb_merge_sort_block_size| 1048576 |
> | innodb_page_size| 16384 |
< | innodb_purge_threads| 0|
> | innodb_purge_threads| 1 |
> | innodb_read_ahead | linear|
> | innodb_recovery_stats | OFF |
> | innodb_recovery_update_relay_log| OFF |
> | innodb_show_locks_held| 10|
> | innodb_show_verbose_locks | 0 |
> | innodb_simulate_comp_failures | 0 |
> | innodb_stats_auto_update| 1 |
> | innodb_stats_modified_counter | 0 |
> | innodb_stats_traditional| ON|
> | innodb_stats_update_need_lock | 1 |
> | innodb_thread_concurrency_timer_based | OFF |
> | innodb_track_changed_pages| OFF |
> | innodb_use_atomic_writes| OFF |
> | innodb_use_fallocate| OFF |
> | innodb_use_global_flush_log_at_trx_commit | ON|
> | innodb_use_stacktrace | OFF |
< | innodb_version| 5.5.57 |
> | innodb_use_sys_stats_table| OFF |
> | innodb_version| 5.5.52-MariaDB-38.3 |
< | interactive_timeout | 28800|
< | join_buffer_size| 131072 |
> | interactive_timeout | 25|
> | join_buffer_size| 2097152 |
> | join_buffer_space_limit | 2097152 |
> | join_cache_level| 2 |
< | key_buffer_size | 16777216 |
> | key_buffer_size | 268435456 |
> | key_cache_segments| 0 |
> | lc_messages_dir | |
< | long_query_time | 2.000000 |
> | long_query_time | 10.000000 |
< | max_allowed_packet| 1073741824 |
> | master_verify_checksum| OFF |
> | max_allowed_packet| 16777216|
< | max_binlog_size | 104857600|
> | max_binlog_size | 1073741824|
< | max_connect_errors| 10 |
< | max_connections | 151|
> | max_connect_errors| 1000|
> | max_connections | 150 |
< | max_long_data_size| 1073741824 |
> | max_long_data_size| 16777216|
< | max_user_connections| 0|
> | max_user_connections| 150 |
> | mrr_buffer_size | 262144|
> | myisam_block_size | 1024|
< | myisam_max_sort_file_size | 2146435072 |
< | myisam_mmap_size| 4294967295 |
< | myisam_recover_options| BACKUP |
> | myisam_max_sort_file_size | 9223372036853727232 |
> | myisam_mmap_size| 18446744073709551615|
> | myisam_recover_options| DEFAULT |
< | myisam_sort_buffer_size | 8388608|
> | myisam_sort_buffer_size | 67108864|
< | new | OFF|
> | old_mode| |
< | optimizer_switch| index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on |
> | 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=off |
> | query_cache_strip_comments| OFF |
< | read_buffer_size| 131072 |
> | read_buffer_size| 1048576 |
< | read_rnd_buffer_size| 262144 |
> | read_rnd_buffer_size| 4194304 |
> | replicate_annotate_row_events | OFF |
> | 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 | |
> | rowid_merge_buff_size | 8388608 |
> | secure_file_priv| |
> | skip_replication| OFF |
> | slave_sql_verify_checksum | ON|
< | slow_query_log| ON |
< | sort_buffer_size| 2097152|
> | slow_query_log| OFF |
> | sort_buffer_size| 1048576 |
< | table_open_cache| 400|
> | table_open_cache| 256 |
< | thread_stack| 196608 |
> | thread_pool_idle_timeout| 60|
> | thread_pool_max_threads | 500 |
> | thread_pool_oversubscribe | 3 |
> | thread_pool_size| 2 |
> | thread_pool_stall_limit | 500 |
> | thread_stack| 294912|
< | version | 5.5.57-0ubuntu0.14.04.1-log|
< | version_comment | (Ubuntu) |
< | version_compile_machine | i686 |
< | version_compile_os| debian-linux-gnu |
< | wait_timeout| 28800|
> | userstat| OFF |
> | version | 5.5.56-MariaDB|
> | version_comment | MariaDB Server|
> | version_compile_machine | x86_64|
> | version_compile_os| Linux |
> | wait_timeout| 25|
我现在意识到这个差异可能是在我将以下内容添加到MariaDB的my.cnf文件之前：
skip-external-locking
key_buffer = 16M
key_buffer_size = 256M
max_allowed_packet = 1024M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_stack = 192K
thread_cache_size = 8
query_cache_limit = 1M
query_cache_size = 16M
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 8