我有一个每秒10,000次查询的生产系统。我最近更新到MySQL v5.5，现在面临一个问题：我的InnoDB表突然被锁定。
Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | INSERT INTO P.S (PREFERENCE, PROPERTY_TYPE, RES_COM, BEDROOM_NUM, BATHROOM_NUM, PRIC Updating | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE property.PROFILE SET PASSWORD=AES_ENCRYPT(XXX) WHERE PROFILEID='4987835' Waiting for table level lock | UPDATE property.PROFILE SET PASSWORD=AES_ENCRYPT(XXXX) WHERE PROFILEID='5405007' Waiting for table level lock | UPDATE P.P SET SCREENING = 'N' WHERE PROFILEID='560353' Waiting for table level lock | UPDATE P.P SET PASSWORD=AES_ENCRYPT(XXXX) WHERE PROFILEID='5405009' Waiting for table level lock | UPDATE P.P SET PASSWORD=AES_ENCRYPT(XXXXX) WHERE PROFILEID='4987835' Waiting for table level lock | UPDATE P.P SET PASSWORD=AES_ENCRYPT(XXXX) WHERE PROFILEID='540502' Waiting for table level lock | UPDATE P.S SET ACTIVATED = 'Y', SCREENING = 'N' WHERE SPID = '8252535' Waiting for table level lock | UPDATE P.P SET MODIFY_DATE = now() WHERE PROFILEID = '3481803'
这可能是什么问题？
以下SHOW VARIABLES LIKE '%innodb%';的输出：
+---------------------------------+-------------------------+ | Variable_name | Value | +---------------------------------+-------------------------+ | have_innodb | YES | | ignore_builtin_innodb | OFF | | innodb_adaptive_flushing | ON | | innodb_adaptive_hash_index | ON | | innodb_additional_mem_pool_size | 134217728 | | innodb_autoextend_increment | 8 | | innodb_autoinc_lock_mode | 1 | | innodb_buffer_pool_instances | 5 | | innodb_buffer_pool_size | 3221225472 | | innodb_change_buffering | all | | innodb_checksums | ON | | innodb_commit_concurrency | 50 | | innodb_concurrency_tickets | 500 | | innodb_data_file_path | ibdata1:100M:autoextend | | innodb_data_home_dir | mysql5/data/ | | 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 | ON | | innodb_flush_log_at_trx_commit | 2 | | innodb_flush_method | O_DIRECT | | innodb_force_load_corrupted | OFF | | innodb_force_recovery | 0 | | innodb_io_capacity | 200 | | innodb_large_prefix | OFF | | innodb_lock_wait_timeout | 100 | | innodb_locks_unsafe_for_binlog | OFF | | innodb_log_buffer_size | 8388608 | | innodb_log_file_size | 536870912 | | innodb_log_files_in_group | 2 | | innodb_log_group_home_dir | ./ | | 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 | 100 | | 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 | 64 | | 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 | +---------------------------------+-------------------------+