MySQL-5.6.34通过show global status like 来查看sql语句的执行情

需求

老大：zain啊，咱们的数据库今天有多少查询语句啊？
我 ：额，稍等，我看看啊； 心想，{尼玛，我怎么知道有多少select语句啊}

那么问题来了，如何查看MySQL数据库的生产服务器有多少的查询语句那？这里使用到了show global status like 命令来查询，同时写了一个简单的脚本，每天定时00.00执行，然后发送到管理员邮箱来实现sql语句的执行状态记录；

通过 show global status;

可以列出MySQL服务器运行sql语句的各种状态值，我个人较喜欢的用法是show global status like '查询值%'; 来查询某个值，下面就说一下我们线上都做了那些值得记录，
注意哦：要在并发量不大的情况下操作，在slave服务器上执行查询语句，如果在线上并发量很大的情况下操作，出现问题自己负责，这里已经做了说明，下面就开开始实操演练；

mysql> show global status;             #此次在内部测试服务器操作+-----------------------------------------------+---------------------+| Variable_name                                 | Value               |+-----------------------------------------------+---------------------+| Aborted_clients                               | 0                   || Aborted_connects                              | 0                   || Binlog_cache_disk_use                         | 0                   || Binlog_cache_use                              | 1852                || Binlog_stmt_cache_disk_use                    | 0                   || Binlog_stmt_cache_use                         | 2025                || Bytes_received                                | 36011812            || Bytes_sent                                    | 331183221           || Com_admin_commands                            | 0                   || Com_assign_to_keycache                        | 0                   || 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                               | 0                   || Com_alter_tablespace                          | 0                   || Com_alter_user                                | 0                   || Com_analyze                                   | 0                   || Com_begin                                     | 1854                || Com_binlog                                    | 0                   || Com_call_procedure                            | 0                   || Com_change_db                                 | 32944               || Com_change_master                             | 0                   || Com_check                                     | 0                   || Com_checksum                                  | 0                   || Com_commit                                    | 1852                || 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                              | 2009                || Com_create_trigger                            | 0                   || Com_create_udf                                | 0                   || Com_create_user                               | 0                   || Com_create_view                               | 0                   || Com_dealloc_sql                               | 0                   || Com_delete                                    | 18                  || 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                                | 14                  || Com_drop_trigger                              | 0                   || Com_drop_user                                 | 0                   || Com_drop_view                                 | 0                   || Com_empty_query                               | 0                   || Com_execute_sql                               | 0                   || Com_flush                                     | 6                   || Com_get_diagnostics                           | 0                   || Com_grant                                     | 0                   || Com_ha_close                                  | 0                   || Com_ha_open                                   | 0                   || Com_ha_read                                   | 0                   || Com_help                                      | 0                   || Com_insert                                    | 1825                || 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                         | 44                  || 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                                    | 0                   || Com_revoke_all                                | 0                   || Com_rollback                                  | 0                   || Com_rollback_to_savepoint                     | 32812               || Com_savepoint                                 | 44                  || Com_select                                    | 65692               || Com_set_option                                | 229794              || Com_signal                                    | 0                   || Com_show_binlog_events                        | 0                   || Com_show_binlogs                              | 0                   || Com_show_charsets                             | 0                   || Com_show_collations                           | 0                   || Com_show_create_db                            | 44                  || Com_show_create_event                         | 0                   || Com_show_create_func                          | 0                   || Com_show_create_proc                          | 0                   || Com_show_create_table                         | 65628               || Com_show_create_trigger                       | 0                   || Com_show_databases                            | 4                   || Com_show_engine_logs                          | 0                   || Com_show_engine_mutex                         | 0                   || Com_show_engine_status                        | 0                   || Com_show_events                               | 0                   || Com_show_errors                               | 0                   || Com_show_fields                               | 32816               || Com_show_function_code                        | 0                   || Com_show_function_status                      | 44                  || Com_show_grants                               | 0                   || Com_show_keys                                 | 0                   || Com_show_master_status                        | 2                   || Com_show_open_tables                          | 0                   || Com_show_plugins                              | 0                   || Com_show_privileges                           | 0                   || Com_show_procedure_code                       | 0                   || Com_show_procedure_status                     | 44                  || Com_show_processlist                          | 0                   || Com_show_profile                              | 0                   || Com_show_profiles                             | 0                   || Com_show_relaylog_events                      | 0                   || Com_show_slave_hosts                          | 0                   || Com_show_slave_status                         | 1                   || Com_show_status                               | 19                  || Com_show_storage_engines                      | 0                   || Com_show_table_status                         | 32816               || Com_show_tables                               | 88                  || Com_show_triggers                             | 32812               || Com_show_variables                            | 4                   || Com_show_warnings                             | 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                             | 2                   || Com_update                                    | 9                   || Com_update_multi                              | 0                   || 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                 || Connection_errors_accept                      | 0                   || Connection_errors_internal                    | 0                   || Connection_errors_max_connections             | 0                   || Connection_errors_peer_address                | 0                   || Connection_errors_select                      | 0                   || Connection_errors_tcpwrap                     | 0                   || Connections                                   | 25                  || Created_tmp_disk_tables                       | 65718               || Created_tmp_files                             | 6                   || Created_tmp_tables                            | 98673               || Delayed_errors                                | 0                   || Delayed_insert_threads                        | 0                   || Delayed_writes                                | 0                   || Flush_commands                                | 5                   || Handler_commit                                | 40181               || Handler_delete                                | 18                  || Handler_discover                              | 0                   || Handler_external_lock                         | 69652               || Handler_mrr_init                              | 0                   || Handler_prepare                               | 7408                || Handler_read_first                            | 32892               || Handler_read_key                              | 32800               || Handler_read_last                             | 0                   || Handler_read_next                             | 2446                || Handler_read_prev                             | 0                   || Handler_read_rnd                              | 2                   || Handler_read_rnd_next                         | 1625151             || Handler_rollback                              | 0                   || Handler_savepoint                             | 44                  || Handler_savepoint_rollback                    | 32812               || Handler_update                                | 9                   || Handler_write                                 | 581378              || Innodb_buffer_pool_dump_status                | not started         || Innodb_buffer_pool_load_status                | not started         || Innodb_buffer_pool_pages_data                 | 2938                || Innodb_buffer_pool_bytes_data                 | 48136192            || Innodb_buffer_pool_pages_dirty                | 0                   || Innodb_buffer_pool_bytes_dirty                | 0                   || Innodb_buffer_pool_pages_flushed              | 13248               || Innodb_buffer_pool_pages_free                 | 1024                || Innodb_buffer_pool_pages_misc                 | 134                 || Innodb_buffer_pool_pages_total                | 4096                || Innodb_buffer_pool_read_ahead_rnd             | 0                   || Innodb_buffer_pool_read_ahead                 | 2995                || Innodb_buffer_pool_read_ahead_evicted         | 0                   || Innodb_buffer_pool_read_requests              | 3195417             || Innodb_buffer_pool_reads                      | 117058              || Innodb_buffer_pool_wait_free                  | 0                   || Innodb_buffer_pool_write_requests             | 659438              || Innodb_data_fsyncs                            | 13372               || Innodb_data_pending_fsyncs                    | 0                   || Innodb_data_pending_reads                     | 0                   || Innodb_data_pending_writes                    | 0                   || Innodb_data_read                              | 1969115136          || Innodb_data_reads                             | 152955              || Innodb_data_writes                            | 40775               || Innodb_data_written                           | 484839424           || Innodb_dblwr_pages_written                    | 13248               || Innodb_dblwr_writes                           | 225                 || Innodb_have_atomic_builtins                   | ON                  || Innodb_log_waits                              | 0                   || Innodb_log_write_requests                     | 84221               || Innodb_log_writes                             | 20817               || Innodb_os_log_fsyncs                          | 4488                || Innodb_os_log_pending_fsyncs                  | 0                   || Innodb_os_log_pending_writes                  | 0                   || Innodb_os_log_written                         | 50665472            || Innodb_page_size                              | 16384               || Innodb_pages_created                          | 9189                || Innodb_pages_read                             | 120052              || Innodb_pages_written                          | 13248               || Innodb_row_lock_current_waits                 | 0                   || Innodb_row_lock_time                          | 0                   || Innodb_row_lock_time_avg                      | 0                   || Innodb_row_lock_time_max                      | 0                   || Innodb_row_lock_waits                         | 0                   || Innodb_rows_deleted                           | 18                  || Innodb_rows_inserted                          | 109509              || Innodb_rows_read                              | 1019289             || Innodb_rows_updated                           | 9                   || Innodb_num_open_files                         | 500                 || Innodb_truncated_status_writes                | 0                   || Innodb_available_undo_logs                    | 128                 || Key_blocks_not_flushed                        | 0                   || Key_blocks_unused                             | 3349                || Key_blocks_used                               | 20                  || Key_read_requests                             | 154                 || Key_reads                                     | 40                  || Key_write_requests                            | 0                   || Key_writes                                    | 0                   || Last_query_cost                               | 0.000000            || Last_query_partial_plans                      | 0                   || Max_used_connections                          | 2                   || Not_flushed_delayed_rows                      | 0                   || Open_files                                    | 48                  || Open_streams                                  | 0                   || Open_table_definitions                        | 1024                || Open_tables                                   | 1024                || Opened_files                                  | 338824              || Opened_table_definitions                      | 69472               || Opened_tables                                 | 67459               || Performance_schema_accounts_lost              | 0                   || Performance_schema_cond_classes_lost          | 0                   || Performance_schema_cond_instances_lost        | 0                   || Performance_schema_digest_lost                | 400946              || Performance_schema_file_classes_lost          | 0                   || Performance_schema_file_handles_lost          | 0                   || Performance_schema_file_instances_lost        | 0                   || Performance_schema_hosts_lost                 | 0                   || Performance_schema_locker_lost                | 0                   || Performance_schema_mutex_classes_lost         | 0                   || Performance_schema_mutex_instances_lost       | 0                   || Performance_schema_rwlock_classes_lost        | 0                   || Performance_schema_rwlock_instances_lost      | 0                   || Performance_schema_session_connect_attrs_lost | 0                   || Performance_schema_socket_classes_lost        | 0                   || Performance_schema_socket_instances_lost      | 0                   || Performance_schema_stage_classes_lost         | 0                   || Performance_schema_statement_classes_lost     | 0                   || Performance_schema_table_handles_lost         | 0                   || Performance_schema_table_instances_lost       | 19582               || Performance_schema_thread_classes_lost        | 0                   || Performance_schema_thread_instances_lost      | 0                   || Performance_schema_users_lost                 | 0                   || Prepared_stmt_count                           | 0                   || Qcache_free_blocks                            | 1                   || Qcache_free_memory                            | 8371208             || Qcache_hits                                   | 0                   || Qcache_inserts                                | 0                   || Qcache_lowmem_prunes                          | 0                   || Qcache_not_cached                             | 65692               || Qcache_queries_in_cache                       | 0                   || Qcache_total_blocks                           | 1                   || Queries                                       | 531413              || Questions                                     | 525683              || Select_full_join                              | 0                   || Select_full_range_join                        | 0                   || Select_range                                  | 0                   || Select_range_check                            | 0                   || Select_scan                                   | 131435              || Slave_heartbeat_period                        | 1800.000            || Slave_last_heartbeat                          | 2018-01-19 16:04:15 || Slave_open_temp_tables                        | 0                   || Slave_received_heartbeats                     | 104                 || Slave_retried_transactions                    | 0                   || Slave_running                                 | ON                  || Slow_launch_threads                           | 0                   || Slow_queries                                  | 32788               || Sort_merge_passes                             | 0                   || Sort_range                                    | 0                   || Sort_rows                                     | 0                   || Sort_scan                                     | 4                   || Ssl_accept_renegotiates                       | 0                   || Ssl_accepts                                   | 0                   || Ssl_callback_cache_hits                       | 0                   || Ssl_cipher                                    |                     || Ssl_cipher_list                               |                     || Ssl_client_connects                           | 0                   || Ssl_connect_renegotiates                      | 0                   || Ssl_ctx_verify_depth                          | 0                   || Ssl_ctx_verify_mode                           | 0                   || Ssl_default_timeout                           | 0                   || Ssl_finished_accepts                          | 0                   || Ssl_finished_connects                         | 0                   || Ssl_server_not_after                          |                     || Ssl_server_not_before                         |                     || 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                   || Ssl_used_session_cache_entries                | 0                   || Ssl_verify_depth                              | 0                   || Ssl_verify_mode                               | 0                   || Ssl_version                                   |                     || Table_locks_immediate                         | 34826               || Table_locks_waited                            | 0                   || Table_open_cache_hits                         | 99275               || Table_open_cache_misses                       | 67459               || Table_open_cache_overflows                    | 64385               || Tc_log_max_pages_used                         | 0                   || Tc_log_page_size                              | 0                   || Tc_log_page_waits                             | 0                   || Threads_cached                                | 1                   || Threads_connected                             | 1                   || Threads_created                               | 2                   || Threads_running                               | 1                   || Uptime                                        | 196795              || Uptime_since_flush_status                     | 196795              |+-----------------------------------------------+---------------------+

那么那些是我么需要注意的那？

Com_insert: 执行insert的操作次数，插入一次，累加一次，对于批量插入，也只能算一次
Com_delete: 执行delete的操作次数
Com_update: 执行update的操作次数
Com_select: 执行select的操作次数，查询一次，累加一次
Slow:为满查询次数
除了增删改查外，还包括存储过程，事务提交，回滚，表锁等情况的分析。
从对应的value值，可以知道每种语句执行的次数。
通过Com_commit,Com_rollback参数能分析出提交和回滚的状态，如果发现回滚
次数太多，这个时候一般是我们的程序编写有问题，导致程序操作数据库时，总是出现事务的回滚，
或许要从程序入手，寻找问题原因和解决办法。

命令行通过命令来查看select语句的次数

# mysql -uroot -p -e "show global status like 'Com_select%';"+--------------------+--------+| Variable_name | Value |+-------------------+---------+| Com_select    | 65693 |+------------------+----------+

到这里，就可以去交差了；
希望对大家有帮助！！！