MySQL - 查询性能问题 - 花费 25 秒以上

Question

我一直试图找出为什么这个查询花了这么长时间。以前，它的执行时间约为 150 毫秒到 200 毫秒，但现在需要 25 秒或更长时间。这是从昨晚到今天之间的事。唯一改变的就是将数据添加到表中。

根据下面的解释输出以及我提供的 SQL，是否有任何突出的内容可以解释为什么查询现在需要这么长时间？

更新:根据 halfer 的评论，我将顺序更改为 ORDER BYpins.pin_id ，它使执行时间达到 172ms。

另外，我想提一下，表钉有 2000 万条记录，板有 339,000 条记录，用户有 352738 条记录。

+----+--------------------+---------------+-----------------+----------------------------------------------+---------+---------+--------------------------------+------+--------------------------+
| id | select_type        | table         | type            | possible_keys                                | key     | key_len | ref                            | rows | Extra                    |
+----+--------------------+---------------+-----------------+----------------------------------------------+---------+---------+--------------------------------+------+--------------------------+
|  1 | PRIMARY            | <derived11>   | system          | NULL                                         | NULL    | NULL    | NULL                           |    1 |                          |
|  1 | PRIMARY            | pins          | index           | user_id,user_id_2,latitude,longitude,lat_lon | vip     | 1       | NULL                           |  646 | Using where              |
|  1 | PRIMARY            | users         | eq_ref          | PRIMARY                                      | PRIMARY | 8       | skoovy_prd.pins.user_id        |    1 |                          |
|  1 | PRIMARY            | boards        | eq_ref          | PRIMARY                                      | PRIMARY | 8       | skoovy_prd.pins.board_id       |    1 |                          |
|  1 | PRIMARY            | via           | eq_ref          | PRIMARY                                      | PRIMARY | 8       | skoovy_prd.pins.via            |    1 |                          |
| 12 | DEPENDENT SUBQUERY | users         | unique_subquery | PRIMARY                                      | PRIMARY | 8       | func                           |    1 | Using where              |
| 11 | DERIVED            | NULL          | NULL            | NULL                                         | NULL    | NULL    | NULL                           | NULL | No tables used           |
| 10 | DEPENDENT SUBQUERY | users_avatars | ref             | pin_id                                       | pin_id  | 14      | skoovy_prd.users.user_id,const |    1 | Using where              |
|  9 | DEPENDENT SUBQUERY | users_avatars | ref             | pin_id                                       | pin_id  | 14      | skoovy_prd.users.user_id,const |    1 | Using where              |
|  8 | DEPENDENT SUBQUERY | users_avatars | ref             | pin_id                                       | pin_id  | 14      | skoovy_prd.users.user_id,const |    1 | Using where              |
|  7 | DEPENDENT SUBQUERY | pins_images   | ref             | pin_id                                       | pin_id  | 14      | skoovy_prd.pins.pin_id,const   |    1 | Using where              |
|  6 | DEPENDENT SUBQUERY | pins_images   | ref             | pin_id                                       | pin_id  | 14      | skoovy_prd.pins.pin_id,const   |    1 | Using where              |
|  5 | DEPENDENT SUBQUERY | pins_images   | ref             | pin_id                                       | pin_id  | 14      | skoovy_prd.pins.pin_id,const   |    1 | Using where              |
|  4 | DEPENDENT SUBQUERY | pins_images   | ref             | pin_id                                       | pin_id  | 14      | skoovy_prd.pins.pin_id,const   |    1 | Using where              |
|  3 | DEPENDENT SUBQUERY | pins_reports  | index           | user_id                                      | user_id | 115     | NULL                           |    1 | Using where; Using index |
|  2 | DEPENDENT SUBQUERY | pins_likes    | ref             | pin_id,pin_id_2,user_id                      | pin_id  | 16      | skoovy_prd.pins.pin_id,const   |    1 | Using index              |
+----+--------------------+---------------+-----------------+----------------------------------------------+---------+---------+--------------------------------+------+--------------------------+

SQL:

SELECT 
    `pins`.`pin_id` AS `pin_pin_id`,
    `pins`.`check_unique_id` AS `pin_check_unique_id`,
    `pins`.`category_id` AS `pin_category_id`,
    `pins`.`board_id` AS `pin_board_id`,
    `pins`.`user_id` AS `pin_user_id`,
    `pins`.`date_added` AS `pin_date_added`,
    `pins`.`date_modified` AS `pin_date_modified`,
    `pins`.`likes` AS `pin_likes`,
    `pins`.`comments` AS `pin_comments`,
    `pins`.`repins` AS `pin_repins`,
    `pins`.`description` AS `pin_description`,
    `pins`.`title` AS `pin_title`,
    `pins`.`image` AS `pin_image`,
    `pins`.`price` AS `pin_price`,
    `pins`.`price_currency_code` AS `pin_price_currency_code`,
    `pins`.`price_type` AS `pin_price_type`,
    `pins`.`price_from` AS `pin_price_from`,
    `pins`.`price_to` AS `pin_price_to`,
    `pins`.`event_type` AS `pin_event_type`,
    `pins`.`event_start` AS `pin_event_start`,
    `pins`.`event_end` AS `pin_event_end`,
    `pins`.`from` AS `pin_from`,
    `pins`.`from_md5` AS `pin_from_md5`,
    `pins`.`from_repin` AS `pin_from_repin`,
    `pins`.`is_video` AS `pin_is_video`,
    `pins`.`views` AS `pin_views`,
    `pins`.`latest_comments` AS `pin_latest_comments`,
    `pins`.`source_id` AS `pin_source_id`,
    `pins`.`via` AS `pin_via`,
    `pins`.`repin_from` AS `pin_repin_from`,
    `pins`.`public` AS `pin_public`,
    `pins`.`ub_id` AS `pin_ub_id`,
    `pins`.`total_views` AS `pin_total_views`,
    `pins`.`delete_request` AS `pin_delete_request`,
    `pins`.`pinmarklet` AS `pin_pinmarklet`,
    `pins`.`vip` AS `pin_vip`,
    `pins`.`store` AS `pin_store`,
    `pins`.`width` AS `pin_width`,
    `pins`.`height` AS `pin_height`,
    `pins`.`ext` AS `pin_ext`,
    `pins`.`location` AS `pin_location`,
    `pins`.`latitude` AS `pin_latitude`,
    `pins`.`longitude` AS `pin_longitude`,
    IF(pins.price_type != ''
            AND (pins.price_type = 'CUSTOM_RANGE'
            AND pins.price_from <> 0.00
            AND pins.price_to <> 0.00
            AND pins.price_from < pins.price_to)
            OR (pins.price_from <> 0.00),
        1,
        0) AS `pin_show_pricing`,
    IF(pins.price_type = 'CUSTOM_RANGE',
        CONCAT('$',
                pins.price_from,
                '-',
                '$',
                pins.price_to),
        CONCAT('$', pins.price_from)) AS `pin_price_text`,
    IF((pins.event_start IS NOT NULL
            || pins.event_end IS NOT NULL)
            && (pins.event_start != '0000-00-00 00:00:00'
            || pins.event_end != '0000-00-00 00:00:00')
            && (event_type = 'multiple'
            || event_type = 'single'),
        1,
        0) AS `pin_show_event`,
    IF(pins.event_type = 'multiple',
        CONCAT(DATE_FORMAT(pins.event_start, '%Y-%m-%d'),
                ' - ',
                DATE_FORMAT(pins.event_end, '%Y-%m-%d')),
        DATE_FORMAT(pins.event_start, '%Y-%m-%d')) AS `pin_event_text`,
    (SELECT 
            COUNT(like_id)
        FROM
            `pins_likes`
        WHERE
            (pin_id = pins.pin_id)
                AND (user_id = 57610)
        LIMIT 1) AS `pin_is_liked`,
    (SELECT 
            COUNT(pr_id)
        FROM
            `pins_reports`
        WHERE
            (pin_id = pins.pin_id) AND (checked = 0)
                AND (user_id = '57610'
                OR user_ip = '44021cb8')
        LIMIT 1) AS `pin_is_reported`,
    (SELECT 
            CONCAT_WS('|||',
                        image,
                        width,
                        height,
                        original,
                        mime)
        FROM
            `pins_images`
        WHERE
            (pin_id = pins.pin_id) AND (size = '_A')
        LIMIT 1) AS `pin_thumb_a`,
    (SELECT 
            CONCAT_WS('|||',
                        image,
                        width,
                        height,
                        original,
                        mime)
        FROM
            `pins_images`
        WHERE
            (pin_id = pins.pin_id) AND (size = '_B')
        LIMIT 1) AS `pin_thumb_b`,
    (SELECT 
            CONCAT_WS('|||',
                        image,
                        width,
                        height,
                        original,
                        mime)
        FROM
            `pins_images`
        WHERE
            (pin_id = pins.pin_id) AND (size = '_C')
        LIMIT 1) AS `pin_thumb_c`,
    (SELECT 
            CONCAT_WS('|||',
                        image,
                        width,
                        height,
                        original,
                        mime)
        FROM
            `pins_images`
        WHERE
            (pin_id = pins.pin_id) AND (size = '_D')
        LIMIT 1) AS `pin_thumb_d`,
    `users`.`user_id` AS `user_user_id`,
    `users`.`source` AS `user_source`,
    `users`.`source_uuid` AS `user_source_uuid`,
    `users`.`is_business` AS `user_is_business`,
    `users`.`username` AS `user_username`,
    `users`.`password` AS `user_password`,
    `users`.`email` AS `user_email`,
    `users`.`new_email` AS `user_new_email`,
    `users`.`new_email_key` AS `user_new_email_key`,
    `users`.`business_name` AS `user_business_name`,
    `users`.`business_phone` AS `user_business_phone`,
    `users`.`firstname` AS `user_firstname`,
    `users`.`lastname` AS `user_lastname`,
    `users`.`groups` AS `user_groups`,
    `users`.`status` AS `user_status`,
    `users`.`last_action_datetime` AS `user_last_action_datetime`,
    `users`.`last_login` AS `user_last_login`,
    `users`.`ip_address` AS `user_ip_address`,
    `users`.`following` AS `user_following`,
    `users`.`followers` AS `user_followers`,
    `users`.`avatar` AS `user_avatar`,
    `users`.`facebook_id` AS `user_facebook_id`,
    `users`.`twitter_id` AS `user_twitter_id`,
    `users`.`twitter_username` AS `user_twitter_username`,
    `users`.`is_admin` AS `user_is_admin`,
    `users`.`is_developer` AS `user_is_developer`,
    `users`.`gender` AS `user_gender`,
    `users`.`location` AS `user_location`,
    `users`.`latitude` AS `user_latitude`,
    `users`.`longitude` AS `user_longitude`,
    `users`.`website` AS `user_website`,
    `users`.`date_added` AS `user_date_added`,
    `users`.`new_password` AS `user_new_password`,
    `users`.`new_password_key` AS `user_new_password_key`,
    `users`.`facebook_session` AS `user_facebook_session`,
    `users`.`boards` AS `user_boards`,
    `users`.`pins` AS `user_pins`,
    `users`.`likes` AS `user_likes`,
    `users`.`latest_pins` AS `user_latest_pins`,
    `users`.`description` AS `user_description`,
    `users`.`facebook_connect` AS `user_facebook_connect`,
    `users`.`facebook_timeline` AS `user_facebook_timeline`,
    `users`.`twitter_connect` AS `user_twitter_connect`,
    `users`.`dont_search_index` AS `user_dont_search_index`,
    `users`.`delete_account` AS `user_delete_account`,
    `users`.`delete_account_date` AS `user_delete_account_date`,
    `users`.`groups_pin_email` AS `user_groups_pin_email`,
    `users`.`comments_email` AS `user_comments_email`,
    `users`.`likes_email` AS `user_likes_email`,
    `users`.`repins_email` AS `user_repins_email`,
    `users`.`follows_email` AS `user_follows_email`,
    `users`.`email_interval` AS `user_email_interval`,
    `users`.`digest_email` AS `user_digest_email`,
    `users`.`news_email` AS `user_news_email`,
    `users`.`first_login` AS `user_first_login`,
    `users`.`store` AS `user_store`,
    `users`.`width` AS `user_width`,
    `users`.`height` AS `user_height`,
    `users`.`instagram_connect` AS `user_instagram_connect`,
    `users`.`instagram_profile_id` AS `user_instagram_profile_id`,
    `users`.`instagram_token` AS `user_instagram_token`,
    `users`.`enable_follow` AS `user_enable_follow`,
    `users`.`public` AS `user_public`,
    users.username AS `user_fullname`,
    (SELECT 
            CONCAT_WS('|||',
                        image,
                        width,
                        height,
                        original,
                        mime)
        FROM
            `users_avatars`
        WHERE
            (user_id = users.user_id)
                AND (size = '_A')
        LIMIT 1) AS `user_avatar_a`,
    (SELECT 
            CONCAT_WS('|||',
                        image,
                        width,
                        height,
                        original,
                        mime)
        FROM
            `users_avatars`
        WHERE
            (user_id = users.user_id)
                AND (size = '_B')
        LIMIT 1) AS `user_avatar_b`,
    (SELECT 
            CONCAT_WS('|||',
                        image,
                        width,
                        height,
                        original,
                        mime)
        FROM
            `users_avatars`
        WHERE
            (user_id = users.user_id)
                AND (size = '_C')
        LIMIT 1) AS `user_avatar_c`,
    `boards`.`board_id` AS `board_board_id`,
    `boards`.`category_id` AS `board_category_id`,
    `boards`.`user_id` AS `board_user_id`,
    `boards`.`image` AS `board_image`,
    `boards`.`date_added` AS `board_date_added`,
    `boards`.`date_modified` AS `board_date_modified`,
    `boards`.`sort_order` AS `board_sort_order`,
    `boards`.`title` AS `board_title`,
    `boards`.`description` AS `board_description`,
    `boards`.`followers` AS `board_followers`,
    `boards`.`pins` AS `board_pins`,
    `boards`.`public` AS `board_public`,
    `boards`.`latest_pins` AS `board_latest_pins`,
    `boards`.`cover` AS `board_cover`,
    `boards`.`delete_request` AS `board_delete_request`,
    `boards`.`views` AS `board_views`,
    `boards`.`total_views` AS `board_total_views`,
    `via`.`user_id` AS `via_user_id`,
    `via`.`source` AS `via_source`,
    `via`.`source_uuid` AS `via_source_uuid`,
    `via`.`is_business` AS `via_is_business`,
    `via`.`username` AS `via_username`,
    `via`.`password` AS `via_password`,
    `via`.`email` AS `via_email`,
    `via`.`new_email` AS `via_new_email`,
    `via`.`new_email_key` AS `via_new_email_key`,
    `via`.`business_name` AS `via_business_name`,
    `via`.`business_phone` AS `via_business_phone`,
    `via`.`firstname` AS `via_firstname`,
    `via`.`lastname` AS `via_lastname`,
    `via`.`groups` AS `via_groups`,
    `via`.`status` AS `via_status`,
    `via`.`last_action_datetime` AS `via_last_action_datetime`,
    `via`.`last_login` AS `via_last_login`,
    `via`.`ip_address` AS `via_ip_address`,
    `via`.`following` AS `via_following`,
    `via`.`followers` AS `via_followers`,
    `via`.`avatar` AS `via_avatar`,
    `via`.`facebook_id` AS `via_facebook_id`,
    `via`.`twitter_id` AS `via_twitter_id`,
    `via`.`twitter_username` AS `via_twitter_username`,
    `via`.`is_admin` AS `via_is_admin`,
    `via`.`is_developer` AS `via_is_developer`,
    `via`.`gender` AS `via_gender`,
    `via`.`location` AS `via_location`,
    `via`.`latitude` AS `via_latitude`,
    `via`.`longitude` AS `via_longitude`,
    `via`.`website` AS `via_website`,
    `via`.`date_added` AS `via_date_added`,
    `via`.`new_password` AS `via_new_password`,
    `via`.`new_password_key` AS `via_new_password_key`,
    `via`.`facebook_session` AS `via_facebook_session`,
    `via`.`boards` AS `via_boards`,
    `via`.`pins` AS `via_pins`,
    `via`.`likes` AS `via_likes`,
    `via`.`latest_pins` AS `via_latest_pins`,
    `via`.`description` AS `via_description`,
    `via`.`facebook_connect` AS `via_facebook_connect`,
    `via`.`facebook_timeline` AS `via_facebook_timeline`,
    `via`.`twitter_connect` AS `via_twitter_connect`,
    `via`.`dont_search_index` AS `via_dont_search_index`,
    `via`.`delete_account` AS `via_delete_account`,
    `via`.`delete_account_date` AS `via_delete_account_date`,
    `via`.`groups_pin_email` AS `via_groups_pin_email`,
    `via`.`comments_email` AS `via_comments_email`,
    `via`.`likes_email` AS `via_likes_email`,
    `via`.`repins_email` AS `via_repins_email`,
    `via`.`follows_email` AS `via_follows_email`,
    `via`.`email_interval` AS `via_email_interval`,
    `via`.`digest_email` AS `via_digest_email`,
    `via`.`news_email` AS `via_news_email`,
    `via`.`first_login` AS `via_first_login`,
    `via`.`store` AS `via_store`,
    `via`.`width` AS `via_width`,
    `via`.`height` AS `via_height`,
    `via`.`instagram_connect` AS `via_instagram_connect`,
    `via`.`instagram_profile_id` AS `via_instagram_profile_id`,
    `via`.`instagram_token` AS `via_instagram_token`,
    `via`.`enable_follow` AS `via_enable_follow`,
    `via`.`public` AS `via_public`,
    via.username AS `via_fullname`,
    `row` . *,
    @curRow:=@curRow + 1 AS `pin_pin_row`
FROM
    `pins`
        LEFT JOIN
    `users` ON pins.user_id = users.user_id
        LEFT JOIN
    `boards` ON pins.board_id = boards.board_id
        LEFT JOIN
    `users` AS `via` ON pins.via = via.user_id
        INNER JOIN
    (SELECT @curRow:=- 1) AS `row`
WHERE
    (pins.user_id = 57610
        OR IF(pins.user_id = 57610, 1, pins.public) = 1)
        AND (pins.latitude <= 40.78666477795
        AND pins.latitude >= 40.64193322205
        AND pins.longitude <= - 73.910342436525
        AND pins.longitude >= - 74.101288363475)
        AND (pins.user_id = 57610
        OR pins.user_id IN (SELECT 
            user_id
        FROM
            users
        WHERE
            public = 1))
ORDER BY pins.vip DESC , pins.pin_id DESC
LIMIT 30

Answer 1

您可以尝试改变这种情况:

AND (pins.user_id = 57610
OR pins.user_id IN (SELECT 
    user_id
FROM
    users
WHERE
    public = 1))

作者:

AND (pins.user_id = 57610
OR users.public = 1))