MYSQL占用CPU很高？请教配置

CPU:双核1.6G
RAM:6G
+-----------------------------------+------------+
| Variable_name                     | Value      |
+-----------------------------------+------------+
| Aborted_clients                   | 4869       |
| Binlog_cache_disk_use             | 83         |
| Binlog_cache_use                  | 409094     |
| Bytes_received                    | 403        |
| Bytes_sent                        | 29832      |
| Com_select                        | 1          |
| Com_show_processlist              | 7          |
| Com_show_status                   | 4          |
| Com_show_variables                | 1          |
| Connections                       | 46393      |
| Created_tmp_files                 | 2016       |
| Created_tmp_tables                | 1          |
| Flush_commands                    | 1          |
| Handler_read_rnd_next             | 274        |
| Handler_write                     | 273        |
| Innodb_buffer_pool_pages_data     | 10279      |
| Innodb_buffer_pool_pages_dirty    | 85         |
| Innodb_buffer_pool_pages_flushed  | 112529     |
| Innodb_buffer_pool_pages_free     | 65524      |
| Innodb_buffer_pool_pages_misc     | 997        |
| Innodb_buffer_pool_pages_total    | 76800      |
| Innodb_buffer_pool_read_ahead_rnd | 10         |
| Innodb_buffer_pool_read_ahead_seq | 15         |
| Innodb_buffer_pool_read_requests  | 3939265703 |
| Innodb_buffer_pool_reads          | 1746       |
| Innodb_buffer_pool_write_requests | 10278691   |
| Innodb_data_fsyncs                | 834279     |
| Innodb_data_read                  | 47026176   |
| Innodb_data_reads                 | 2747       |
| Innodb_data_writes                | 940042     |
| Innodb_data_written               | 384651264  |
| Innodb_dblwr_pages_written        | 112529     |
| Innodb_dblwr_writes               | 6373       |
| Innodb_log_waits                  | 2          |
| Innodb_log_write_requests         | 1186473    |
| Innodb_log_writes                 | 816693     |
| Innodb_os_log_fsyncs              | 821071     |
| Innodb_os_log_pending_writes      | 1          |
| Innodb_os_log_written             | 990151680  |
| Innodb_page_size                  | 16384      |
| Innodb_pages_created              | 7542       |
| Innodb_pages_read                 | 2737       |
| Innodb_pages_written              | 112529     |
| Innodb_row_lock_time              | 49109      |
| Innodb_row_lock_time_avg          | 71         |
| Innodb_row_lock_time_max          | 703        |
| Innodb_row_lock_waits             | 687        |
| Innodb_rows_deleted               | 87811      |
| Innodb_rows_inserted              | 248869     |
| Innodb_rows_read                  | 443582876  |
| Innodb_rows_updated               | 984719     |
| Key_blocks_unused                 | 319194     |
| Key_blocks_used                   | 12061      |
| Key_read_requests                 | 1316119156 |
| Key_reads                         | 75733      |
| Key_write_requests                | 1145522    |
| Key_writes                        | 387723     |
| Last_query_cost                   | 10.499000  |
| Max_used_connections              | 56         |
| Open_files                        | 54         |
| Open_table_definitions            | 70         |
| Open_tables                       | 47         |
| Opened_files                      | 71932      |
| Prepared_stmt_count               | 9          |
| Qcache_free_blocks                | 7146       |
| Qcache_free_memory                | 13911752   |
| Qcache_hits                       | 553377     |
| Qcache_inserts                    | 324411     |
| Qcache_lowmem_prunes              | 26555      |
| Qcache_not_cached                 | 376816     |
| Qcache_queries_in_cache           | 15508      |
| Qcache_total_blocks               | 38232      |
| Queries                           | 4596808    |
| Questions                         | 13         |
| Select_scan                       | 1          |
| Slow_launch_threads               | 1          |
| Table_locks_immediate             | 1804112    |
| Table_locks_waited                | 83183      |
| Threads_connected                 | 30         |
| Threads_created                   | 2854       |
| Threads_running                   | 8          |
| Uptime                            | 126433     |
| Uptime_since_flush_status         | 126433     |
+-----------------------------------+------------+