InnoDB、MyISAM 都是MySQL存储引擎,在InnoDB存储引擎中,page是最小单位,然后是extent(区),段(segment)和tablespace,和Oracle在名称上较为相似。
默认情况下,表空间的page的大小为16K,但可以调整默认大小(innodb_page_size),Page的数量最少为64个,常见的组合如下所示:
Page Size | Page Count | Extent Size |
---|---|---|
4KB | 256 | 1MB |
8KB | 128 | 1MB |
16KB | 64 | 1MB |
32KB | 64 | 2MB |
64KB | 64 | 4MB |
InnoDB方式作为存储引擎,文件会分为.frm和.ibd两类,简单说明如下:
可以通过show engines命令来确认当前的存储引擎, 可以看到InnoDB是DEFAULT的设定。
mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| CSV | YES | CSV storage engine | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.00 sec)
mysql>
Name | Cmd-Line | Option File | System Var | Status Var | Var Scope | Dynamic |
---|---|---|---|---|---|---|
daemon_memcached_enable_binlog | Yes | Yes | Yes | Global | No | |
daemon_memcached_engine_lib_name | Yes | Yes | Yes | Global | No | |
daemon_memcached_engine_lib_path | Yes | Yes | Yes | Global | No | |
daemon_memcached_option | Yes | Yes | Yes | Global | No | |
daemon_memcached_r_batch_size | Yes | Yes | Yes | Global | No | |
daemon_memcached_w_batch_size | Yes | Yes | Yes | Global | No | |
foreign_key_checks | Yes | Both | Yes | |||
ignore-builtin-innodb | Yes | Yes | Global | No | ||
- Variable: ignore_builtin_innodb | Yes | Global | No | |||
innodb | Yes | Yes | ||||
innodb_adaptive_flushing | Yes | Yes | Yes | Global | Yes | |
innodb_adaptive_flushing_lwm | Yes | Yes | Yes | Global | Yes | |
innodb_adaptive_hash_index | Yes | Yes | Yes | Global | Yes | |
innodb_adaptive_hash_index_parts | Yes | Yes | Yes | Global | No | |
innodb_adaptive_max_sleep_delay | Yes | Yes | Yes | Global | Yes | |
innodb_additional_mem_pool_size | Yes | Yes | Yes | Global | No | |
innodb_api_bk_commit_interval | Yes | Yes | Yes | Global | Yes | |
innodb_api_disable_rowlock | Yes | Yes | Yes | Global | No | |
innodb_api_enable_binlog | Yes | Yes | Yes | Global | No | |
innodb_api_enable_mdl | Yes | Yes | Yes | Global | No | |
innodb_api_trx_level | Yes | Yes | Yes | Global | Yes | |
innodb_autoextend_increment | Yes | Yes | Yes | Global | Yes | |
innodb_autoinc_lock_mode | Yes | Yes | Yes | Global | No | |
Innodb_available_undo_logs | Yes | Global | No | |||
innodb_background_drop_list_empty | Yes | Yes | Yes | Global | Yes | |
Innodb_buffer_pool_bytes_data | Yes | Global | No | |||
Innodb_buffer_pool_bytes_dirty | Yes | Global | No | |||
innodb_buffer_pool_chunk_size | Yes | Yes | Yes | Global | No | |
innodb_buffer_pool_dump_at_shutdown | Yes | Yes | Yes | Global | Yes | |
innodb_buffer_pool_dump_now | Yes | Yes | Yes | Global | Yes | |
innodb_buffer_pool_dump_pct | Yes | Yes | Yes | Global | Yes | |
Innodb_buffer_pool_dump_status | Yes | Global | No | |||
innodb_buffer_pool_filename | Yes | Yes | Yes | Global | Yes | |
innodb_buffer_pool_instances | Yes | Yes | Yes | Global | No | |
innodb_buffer_pool_load_abort | Yes | Yes | Yes | Global | Yes | |
innodb_buffer_pool_load_at_startup | Yes | Yes | Yes | Global | No | |
innodb_buffer_pool_load_now | Yes | Yes | Yes | Global | Yes | |
Innodb_buffer_pool_load_status | Yes | Global | No | |||
Innodb_buffer_pool_pages_data | Yes | Global | No | |||
Innodb_buffer_pool_pages_dirty | Yes | Global | No | |||
Innodb_buffer_pool_pages_flushed | Yes | Global | No | |||
Innodb_buffer_pool_pages_free | Yes | Global | No | |||
Innodb_buffer_pool_pages_latched | Yes | Global | No | |||
Innodb_buffer_pool_pages_misc | Yes | Global | No | |||
Innodb_buffer_pool_pages_total | Yes | Global | No | |||
Innodb_buffer_pool_read_ahead | Yes | Global | No | |||
Innodb_buffer_pool_read_ahead_evicted | Yes | Global | No | |||
Innodb_buffer_pool_read_ahead_rnd | Yes | Global | No | |||
Innodb_buffer_pool_read_requests | Yes | Global | No | |||
Innodb_buffer_pool_reads | Yes | Global | No | |||
Innodb_buffer_pool_resize_status | Yes | Global | No | |||
innodb_buffer_pool_size | Yes | Yes | Yes | Global | Varies | |
Innodb_buffer_pool_wait_free | Yes | Global | No | |||
Innodb_buffer_pool_write_requests | Yes | Global | No | |||
innodb_change_buffer_max_size | Yes | Yes | Yes | Global | Yes | |
innodb_change_buffering | Yes | Yes | Yes | Global | Yes | |
innodb_change_buffering_debug | Yes | Yes | Yes | Global | Yes | |
innodb_checksum_algorithm | Yes | Yes | Yes | Global | Yes | |
innodb_checksums | Yes | Yes | Yes | Global | No | |
innodb_cmp_per_index_enabled | Yes | Yes | Yes | Global | Yes | |
innodb_commit_concurrency | Yes | Yes | Yes | Global | Yes | |
innodb_compress_debug | Yes | Yes | Yes | Global | Yes | |
innodb_compression_failure_threshold_pct | Yes | Yes | Yes | Global | Yes | |
innodb_compression_level | Yes | Yes | Yes | Global | Yes | |
innodb_compression_pad_pct_max | Yes | Yes | Yes | Global | Yes | |
innodb_concurrency_tickets | Yes | Yes | Yes | Global | Yes | |
innodb_data_file_path | Yes | Yes | Yes | Global | No | |
Innodb_data_fsyncs | Yes | Global | No | |||
innodb_data_home_dir | Yes | Yes | Yes | Global | No | |
Innodb_data_pending_fsyncs | Yes | Global | No | |||
Innodb_data_pending_reads | Yes | Global | No | |||
Innodb_data_pending_writes | Yes | Global | No | |||
Innodb_data_read | Yes | Global | No | |||
Innodb_data_reads | Yes | Global | No | |||
Innodb_data_writes | Yes | Global | No | |||
Innodb_data_written | Yes | Global | No | |||
Innodb_dblwr_pages_written | Yes | Global | No | |||
Innodb_dblwr_writes | Yes | Global | No | |||
innodb_deadlock_detect | Yes | Yes | Yes | Global | Yes | |
innodb_default_row_format | Yes | Yes | Yes | Global | Yes | |
innodb_disable_resize_buffer_pool_debug | Yes | Yes | Yes | Global | Yes | |
innodb_disable_sort_file_cache | Yes | Yes | Yes | Global | Yes | |
innodb_doublewrite | Yes | Yes | Yes | Global | No | |
innodb_fast_shutdown | Yes | Yes | Yes | Global | Yes | |
innodb_fil_make_page_dirty_debug | Yes | Yes | Yes | Global | Yes | |
innodb_file_format | Yes | Yes | Yes | Global | Yes | |
innodb_file_format_check | Yes | Yes | Yes | Global | No | |
innodb_file_format_max | Yes | Yes | Yes | Global | Yes | |
innodb_file_per_table | Yes | Yes | Yes | Global | Yes | |
innodb_fill_factor | Yes | Yes | Yes | Global | Yes | |
innodb_flush_log_at_timeout | Yes | Yes | Global | Yes | ||
innodb_flush_log_at_trx_commit | Yes | Yes | Yes | Global | Yes | |
innodb_flush_method | Yes | Yes | Yes | Global | No | |
innodb_flush_neighbors | Yes | Yes | Yes | Global | Yes | |
innodb_flush_sync | Yes | Yes | Yes | Global | Yes | |
innodb_flushing_avg_loops | Yes | Yes | Yes | Global | Yes | |
innodb_force_load_corrupted | Yes | Yes | Yes | Global | No | |
innodb_force_recovery | Yes | Yes | Yes | Global | No | |
innodb_ft_aux_table | Yes | Global | Yes | |||
innodb_ft_cache_size | Yes | Yes | Yes | Global | No | |
innodb_ft_enable_diag_print | Yes | Yes | Yes | Global | Yes | |
innodb_ft_enable_stopword | Yes | Yes | Yes | Both | Yes | |
innodb_ft_max_token_size | Yes | Yes | Yes | Global | No | |
innodb_ft_min_token_size | Yes | Yes | Yes | Global | No | |
innodb_ft_num_word_optimize | Yes | Yes | Yes | Global | Yes | |
innodb_ft_result_cache_limit | Yes | Yes | Yes | Global | Yes | |
innodb_ft_server_stopword_table | Yes | Yes | Yes | Global | Yes | |
innodb_ft_sort_pll_degree | Yes | Yes | Yes | Global | No | |
innodb_ft_total_cache_size | Yes | Yes | Yes | Global | No | |
innodb_ft_user_stopword_table | Yes | Yes | Yes | Both | Yes | |
Innodb_have_atomic_builtins | Yes | Global | No | |||
innodb_io_capacity | Yes | Yes | Yes | Global | Yes | |
innodb_io_capacity_max | Yes | Yes | Yes | Global | Yes | |
innodb_large_prefix | Yes | Yes | Yes | Global | Yes | |
innodb_limit_optimistic_insert_debug | Yes | Yes | Yes | Global | Yes | |
innodb_lock_wait_timeout | Yes | Yes | Yes | Both | Yes | |
innodb_locks_unsafe_for_binlog | Yes | Yes | Yes | Global | No | |
innodb_log_buffer_size | Yes | Yes | Yes | Global | No | |
innodb_log_checkpoint_now | Yes | Yes | Yes | Global | Yes | |
innodb_log_checksum_algorithm | Yes | Yes | Yes | Global | Yes | |
innodb_log_checksums | Yes | Yes | Yes | Global | Yes | |
innodb_log_compressed_pages | Yes | Yes | Yes | Global | Yes | |
innodb_log_file_size | Yes | Yes | Yes | Global | No | |
innodb_log_files_in_group | Yes | Yes | Yes | Global | No | |
innodb_log_group_home_dir | Yes | Yes | Yes | Global | No | |
Innodb_log_waits | Yes | Global | No | |||
innodb_log_write_ahead_size | Yes | Yes | Yes | Global | Yes | |
Innodb_log_write_requests | Yes | Global | No | |||
Innodb_log_writes | Yes | Global | No | |||
innodb_lru_scan_depth | Yes | Yes | Yes | Global | Yes | |
innodb_max_dirty_pages_pct | Yes | Yes | Yes | Global | Yes | |
innodb_max_dirty_pages_pct_lwm | Yes | Yes | Yes | Global | Yes | |
innodb_max_purge_lag | Yes | Yes | Yes | Global | Yes | |
innodb_max_purge_lag_delay | Yes | Yes | Yes | Global | Yes | |
innodb_max_undo_log_size | Yes | Yes | Yes | Global | Yes | |
innodb_merge_threshold_set_all_debug | Yes | Yes | Yes | Global | Yes | |
innodb_monitor_disable | Yes | Yes | Yes | Global | Yes | |
innodb_monitor_enable | Yes | Yes | Yes | Global | Yes | |
innodb_monitor_reset | Yes | Yes | Yes | Global | Yes | |
innodb_monitor_reset_all | Yes | Yes | Yes | Global | Yes | |
Innodb_num_open_files | Yes | Global | No | |||
innodb_numa_interleave | Yes | Yes | Yes | Global | No | |
innodb_old_blocks_pct | Yes | Yes | Yes | Global | Yes | |
innodb_old_blocks_time | Yes | Yes | Yes | Global | Yes | |
innodb_online_alter_log_max_size | Yes | Yes | Yes | Global | Yes | |
innodb_open_files | Yes | Yes | Yes | Global | No | |
innodb_optimize_fulltext_only | Yes | Yes | Yes | Global | Yes | |
innodb_optimize_point_storage | Yes | Yes | Yes | Session | Yes | |
Innodb_os_log_fsyncs | Yes | Global | No | |||
Innodb_os_log_pending_fsyncs | Yes | Global | No | |||
Innodb_os_log_pending_writes | Yes | Global | No | |||
Innodb_os_log_written | Yes | Global | No | |||
innodb_page_cleaners | Yes | Yes | Yes | Global | No | |
Innodb_page_size | Yes | Global | No | |||
innodb_page_size | Yes | Yes | Yes | Global | No | |
Innodb_pages_created | Yes | Global | No | |||
Innodb_pages_read | Yes | Global | No | |||
Innodb_pages_written | Yes | Global | No | |||
innodb_print_all_deadlocks | Yes | Yes | Yes | Global | Yes | |
innodb_purge_batch_size | Yes | Yes | Yes | Global | Yes | |
innodb_purge_rseg_truncate_frequency | Yes | Yes | Yes | Global | Yes | |
innodb_purge_threads | Yes | Yes | Yes | Global | No | |
innodb_random_read_ahead | Yes | Yes | Yes | Global | Yes | |
innodb_read_ahead_threshold | Yes | Yes | Yes | Global | Yes | |
innodb_read_io_threads | Yes | Yes | Yes | Global | No | |
innodb_read_only | Yes | Yes | Yes | Global | No | |
innodb_replication_delay | Yes | Yes | Yes | Global | Yes | |
innodb_rollback_on_timeout | Yes | Yes | Yes | Global | No | |
innodb_rollback_segments | Yes | Yes | Yes | Global | Yes | |
Innodb_row_lock_current_waits | Yes | Global | No | |||
Innodb_row_lock_time | Yes | Global | No | |||
Innodb_row_lock_time_avg | Yes | Global | No | |||
Innodb_row_lock_time_max | Yes | Global | No | |||
Innodb_row_lock_waits | Yes | Global | No | |||
Innodb_rows_deleted | Yes | Global | No | |||
Innodb_rows_inserted | Yes | Global | No | |||
Innodb_rows_read | Yes | Global | No | |||
Innodb_rows_updated | Yes | Global | No | |||
innodb_saved_page_number_debug | Yes | Yes | Yes | Global | Yes | |
innodb_sort_buffer_size | Yes | Yes | Yes | Global | No | |
innodb_spin_wait_delay | Yes | Yes | Yes | Global | Yes | |
innodb_stats_auto_recalc | Yes | Yes | Yes | Global | Yes | |
innodb_stats_include_delete_marked | Yes | Yes | Yes | Global | Yes | |
innodb_stats_method | Yes | Yes | Yes | Global | Yes | |
innodb_stats_on_metadata | Yes | Yes | Yes | Global | Yes | |
innodb_stats_persistent | Yes | Yes | Yes | Global | Yes | |
innodb_stats_persistent_sample_pages | Yes | Yes | Yes | Global | Yes | |
innodb_stats_sample_pages | Yes | Yes | Yes | Global | Yes | |
innodb_stats_transient_sample_pages | Yes | Yes | Yes | Global | Yes | |
innodb-status-file | Yes | Yes | ||||
innodb_status_output | Yes | Yes | Yes | Global | Yes | |
innodb_status_output_locks | Yes | Yes | Yes | Global | Yes | |
innodb_strict_mode | Yes | Yes | Yes | Both | Yes | |
innodb_support_xa | Yes | Yes | Yes | Both | Yes | |
innodb_sync_array_size | Yes | Yes | Yes | Global | No | |
innodb_sync_debug | Yes | Yes | Yes | Global | No | |
innodb_sync_spin_loops | Yes | Yes | Yes | Global | Yes | |
innodb_table_locks | Yes | Yes | Yes | Both | Yes | |
innodb_temp_data_file_path | Yes | Yes | Yes | Global | No | |
innodb_thread_concurrency | Yes | Yes | Yes | Global | Yes | |
innodb_thread_sleep_delay | Yes | Yes | Yes | Global | Yes | |
innodb_tmpdir | Yes | Yes | Yes | Both | Yes | |
Innodb_truncated_status_writes | Yes | Global | No | |||
innodb_trx_purge_view_update_only_debug | Yes | Yes | Yes | Global | Yes | |
innodb_trx_rseg_n_slots_debug | Yes | Yes | Yes | Global | Yes | |
innodb_undo_directory | Yes | Yes | Yes | Global | No | |
innodb_undo_log_truncate | Yes | Yes | Yes | Global | Yes | |
innodb_undo_logs | Yes | Yes | Yes | Global | Yes | |
innodb_undo_tablespaces | Yes | Yes | Yes | Global | No | |
innodb_use_native_aio | Yes | Yes | Yes | Global | No | |
innodb_use_sys_malloc | Yes | Yes | Yes | Global | No | |
innodb_version | Yes | Global | No | |||
innodb_write_io_threads | Yes | Yes | Yes | Global | No | |
timed_mutexes | Yes | Yes | Yes | Global | Yes | |
unique_checks | Yes | Both | Yes |
https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html