因此，我正在监视服务器进程，并且看到mysql正在占用80％以上的cpu uasge。 我检查了mysql中的进程列表，发现有很多查询导致mysql每秒钟执行一次“正在复制到tmp表”状态，同时至少有2个这样的查询。
这些是我的服务器规格： CPU 6核，RAM 10GB
这是查询，其他查询当然相同，但是where子句的值不同
SELECT `e`.*, IF(at_name.value_id > 0, at_name.value, at_name_default.value) AS `name`, `at_price`.`value` AS `price`, IF(at_small_image.value_id > 0, at_small_image.value, at_small_image_default.value) AS `small_image`, `at_special_price`.`value` AS `special_price`, IF(at_special_from_date.value_id > 0, at_special_from_date.value, at_special_from_date_default.value) AS `special_from_date`, IF(at_special_to_date.value_id > 0, at_special_to_date.value, at_special_to_date_default.value) AS `special_to_date`, `cat_index`.`position` AS `cat_index_position` FROM `catalog_product_entity` AS `e`
LEFT JOIN `catalog_product_entity_varchar` AS `at_name_default` ON (`at_name_default`.`entity_id` = `e`.`entity_id`) AND (`at_name_default`.`attribute_id` = '71') AND `at_name_default`.`store_id` = 0
LEFT JOIN `catalog_product_entity_varchar` AS `at_name` ON (`at_name`.`entity_id` = `e`.`entity_id`) AND (`at_name`.`attribute_id` = '71') AND (`at_name`.`store_id` = 2)
LEFT JOIN `catalog_product_entity_decimal` AS `at_price` ON (`at_price`.`entity_id` = `e`.`entity_id`) AND (`at_price`.`attribute_id` = '75') AND (`at_price`.`store_id` = 0)
LEFT JOIN `catalog_product_entity_varchar` AS `at_small_image_default` ON (`at_small_image_default`.`entity_id` = `e`.`entity_id`) AND (`at_small_image_default`.`attribute_id` = '86') AND `at_small_image_default`.`store_id` = 0
LEFT JOIN `catalog_product_entity_varchar` AS `at_small_image` ON (`at_small_image`.`entity_id` = `e`.`entity_id`) AND (`at_small_image`.`attribute_id` = '86') AND (`at_small_image`.`store_id` = 2)
LEFT JOIN `catalog_product_entity_decimal` AS `at_special_price` ON (`at_special_price`.`entity_id` = `e`.`entity_id`) AND (`at_special_price`.`attribute_id` = '76') AND (`at_special_price`.`store_id` = 0)
LEFT JOIN `catalog_product_entity_datetime` AS `at_special_from_date_default` ON (`at_special_from_date_default`.`entity_id` = `e`.`entity_id`) AND (`at_special_from_date_default`.`attribute_id` = '77') AND `at_special_from_date_default`.`store_id` = 0
LEFT JOIN `catalog_product_entity_datetime` AS `at_special_from_date` ON (`at_special_from_date`.`entity_id` = `e`.`entity_id`) AND (`at_special_from_date`.`attribute_id` = '77') AND (`at_special_from_date`.`store_id` = 2)
LEFT JOIN `catalog_product_entity_datetime` AS `at_special_to_date_default` ON (`at_special_to_date_default`.`entity_id` = `e`.`entity_id`) AND (`at_special_to_date_default`.`attribute_id` = '78') AND `at_special_to_date_default`.`store_id` = 0
LEFT JOIN `catalog_product_entity_datetime` AS `at_special_to_date` ON (`at_special_to_date`.`entity_id` = `e`.`entity_id`) AND (`at_special_to_date`.`attribute_id` = '78') AND (`at_special_to_date`.`store_id` = 2)
INNER JOIN `catalog_category_product_index` AS `cat_index` ON cat_index.product_id=e.entity_id AND cat_index.store_id=2 AND cat_index.visibility IN(2, 4) AND cat_index.category_id = '2' WHERE (IF(at_special_to_date.value_id > 0, at_special_to_date.value, at_special_to_date_default.value) >= '2018-10-02 11:48:59') ORDER BY `at_special_price`.`value` asc
This is the query explain:
+----+-------------+------------------------------+--------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------+---------+----------------------------------------------+--------+---------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+------------------------------+--------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------+---------+----------------------------------------------+--------+---------------------------------+
| 1 | SIMPLE | e | ALL | PRIMARY | NULL | NULL | NULL | 129392 | Using temporary; Using filesort |
| 1 | SIMPLE | at_name_default | eq_ref | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ENTITY_ID | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.e.entity_id,const,const | 1 | |
| 1 | SIMPLE | at_name | eq_ref | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ENTITY_ID | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.e.entity_id,const,const | 1 | |
| 1 | SIMPLE | cat_index | eq_ref | PRIMARY,IDX_CAT_CTGR_PRD_IDX_PRD_ID_STORE_ID_CTGR_ID_VISIBILITY,15D3C269665C74C2219037D534F4B0DC | PRIMARY | 10 | const,marketplace.e.entity_id,const | 1 | Using where |
| 1 | SIMPLE | at_price | eq_ref | UNQ_CAT_PRD_ENTT_DEC_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DECIMAL_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DECIMAL_ENTITY_ID,IDX_CATALOG_PRODUCT_ENTITY_DECIMAL_ATTRIBUTE_ID | UNQ_CAT_PRD_ENTT_DEC_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.e.entity_id,const,const | 1 | |
| 1 | SIMPLE | at_small_image_default | eq_ref | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ENTITY_ID | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.cat_index.product_id,const,const | 1 | |
| 1 | SIMPLE | at_small_image | eq_ref | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_VARCHAR_ENTITY_ID | UNQ_CAT_PRD_ENTT_VCHR_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.cat_index.product_id,const,const | 1 | |
| 1 | SIMPLE | at_special_price | eq_ref | UNQ_CAT_PRD_ENTT_DEC_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DECIMAL_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DECIMAL_ENTITY_ID,IDX_CATALOG_PRODUCT_ENTITY_DECIMAL_ATTRIBUTE_ID | UNQ_CAT_PRD_ENTT_DEC_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.e.entity_id,const,const | 1 | |
| 1 | SIMPLE | at_special_from_date_default | eq_ref | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ENTITY_ID | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.cat_index.product_id,const,const | 1 | |
| 1 | SIMPLE | at_special_from_date | eq_ref | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ENTITY_ID | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.e.entity_id,const,const | 1 | |
| 1 | SIMPLE | at_special_to_date_default | eq_ref | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ENTITY_ID | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.cat_index.product_id,const,const | 1 | |
| 1 | SIMPLE | at_special_to_date | eq_ref | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ATTRIBUTE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_STORE_ID,IDX_CATALOG_PRODUCT_ENTITY_DATETIME_ENTITY_ID | UNQ_CAT_PRD_ENTT_DTIME_ENTT_ID_ATTR_ID_STORE_ID | 8 | marketplace.e.entity_id,const,const | 1 | Using where |
+----+-------------+------------------------------+--------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------+---------+----------------------------------------------+--------+---------------------------------+
请告诉我是否需要提供更多信息。