MySQL 慢查询日报（线上 prod591）2026-09-21

统计概览

Top10 明细（按单条耗时）

高频慢查询模式（指纹聚合，取样 21,378 条）

按条数 Top5

按累计耗时 Top5

备份模式全天 43 条 / 1.41h，未触发深度分析（如条数环比异常翻倍再人工介入）。

触发深度分析的模式（条数>100 或 累计>30min，非备份，最多 8 个）

1. DELETE FROM user_profile_latest WHERE create_time < ? LIMIT ?; —— 81 次 × 669.33s = 15.06h

• 代表性 SQL：

DELETE FROM user_profile_latest
    WHERE create_time < '2026-03-18 00:00:03'
    LIMIT 5000;

• 库表：?.user_profile_latest；实例 alias：None
• explain：未执行（无 alias(该 server 无可连 MCP 实例)）
• 慢因：扫描行数远大于返回行数(3,293,400/0)
• 建议：补索引（按 WHERE 等值列在前、范围列收尾建复合索引）; 用 EXPLAIN 验证 key 命中
• 可执行 DDL（建议先在低峰期 EXPLAIN 验证再执行）：

ALTER TABLE `user_profile_latest` ADD INDEX `idx_create_tim` (`create_time`);

2. select a.community_id, MIN(a.user_id) as user_id from t591.sale as a inner join t591_new.market_community_agent_bid_record as b on a.user_id = b.user_id inner j —— 1,795 次 × 4.23s = 2.11h

• 代表性 SQL：

select a.community_id, MIN(a.user_id) as user_id from t591.sale as a inner join `t591_new`.`market_community_agent_bid_record` as `b` on `a`.`user_id` = `b`.`user_id` inner join `t591_new`.`im_user_bind` as `im` on im.im_uid=CONCAT(a.user_id,"") where `a`.`community_id` in ('105035', '3695078', '105075') and `b`.`start_time` >= '2026-09-21 00:00:00' and `b`.`end_time` <= '2026-09-21 23:59:59' and `b`.`status` = '3' and `b`.`proc_status` = '3' and `b`.`deleted` = '0' and `a`.`status` = '2' and `a`.`closed` = '0' group by `a`.`community_id` /* ms:tw591ms-community */;

• 库表：t591.sale；实例 alias：prod-591/master
• explain SQL：

SELECT * FROM `t591`.`sale` WHERE `start_time` >= '2026-09-21 00:00:00' LIMIT 10

• 执行计划（EXPLAIN 表节点，按 JOIN 顺序）：

• 慢因：扫描行数远大于返回行数(1,921,556/3)、EXPLAIN 全表扫描/未用索引、JOIN 条件含函数(如 ON col=CONCAT(...))导致索引失效, 建议冗余类型一致列直连
• 建议：补索引（按 WHERE 等值列在前、范围列收尾建复合索引）; 用 EXPLAIN 验证 key 命中; JOIN 两侧列改为同类型直连(如int列配int列), 或新增冗余绑定列建索引
• 可执行 DDL（建议先在低峰期 EXPLAIN 验证再执行）：

ALTER TABLE `t591`.`sale` ADD INDEX `idx_start_time` (`start_time`);

3. select count(*) as aggregate from sale where status = ? and closed = ? and community_id = ? and kind IN (?...) and posttime >= ? /* ms:tw591ms-cdc */; —— 3,972 次 × 1.67s = 1.85h

• 代表性 SQL：

select count(*) as aggregate from `sale` where `status` = '2' and `closed` = '0' and `community_id` = '25812' and `kind` in ('6', '8', '9', '10', '24') and `posttime` >= '1788624000' /* ms:tw591ms-cdc */;

• 库表：t591.sale；实例 alias：prod-591/master
• explain SQL：

select count(*) as aggregate from `t591`.`sale` where `status` = '2' and `closed` = '0' and `community_id` = '25812' and `kind` in ('6', '8', '9', '10', '24') and `posttime` >= '1788624000' /* ms:tw591ms-cdc */;

• 执行计划（EXPLAIN 表节点，按 JOIN 顺序）：

• 慢因：扫描行数远大于返回行数(7,779/1)
• 建议：补索引（按 WHERE 等值列在前、范围列收尾建复合索引）; 用 EXPLAIN 验证 key 命中
• 可执行 DDL（建议先在低峰期 EXPLAIN 验证再执行）：

ALTER TABLE `t591`.`sale` ADD INDEX `idx_status_closed_community__kind_posttime` (`status`, `closed`, `community_id`, `kind`, `posttime`);

4. select last_contacted_at, uid, is_sticked from im_conversations where conversation IN (?...) and uid != ? and im_conversations.deleted_at is null /* ms:hongyan- —— 2,010 次 × 3.01s = 1.68h

• 代表性 SQL：

select `last_contacted_at`, `uid`, `is_sticked` from `im_conversations` where `conversation` in (select `conversation` from `im_conversations` where `app_id` = '3' and `uid` = '1001' and `deleted_at` is null) and `uid` != '1001' and `im_conversations`.`deleted_at` is null /* ms:hongyan-web-server */

• 库表：?.im_conversations；实例 alias：None
• explain：未执行（无 alias(该 server 无可连 MCP 实例)）
• 慢因：IN (SELECT ...) 子查询(易退化为相关子查询逐行执行, 建议改 JOIN/EXISTS)
• 建议：改写为 JOIN/EXISTS 并验证子查询能下推; 该实例无 MCP 映射, 建议在库上手动 EXPLAIN 复核
• 可执行 DDL（建议先在低峰期 EXPLAIN 验证再执行）：

ALTER TABLE `im_conversations` ADD INDEX `idx_app_id_uid_conversati` (`app_id`, `uid`, `conversation`);

5. SELECT mcrd.id, mcbr.period_id as ?, mcrd.record_id ?, if(mcbr.parent_id!=?,mcbr.parent_id,null) ?, mcrd.oid ?, mcrd.user_id ?, case mcrd.payment_type when ? th —— 1 次 × 5789.21s = 1.61h

• 代表性 SQL：

SELECT 
mcrd.`id`,
mcbr.period_id as '期数',
mcrd.`record_id` '竞价ID',
if(mcbr.parent_id!=0,mcbr.parent_id,null) '父竞价ID',
mcrd.oid '订单ID',
mcrd.`user_id` '会员ID',
case mcrd.`payment_type` when 1 then '竞价' when 2 then '调价' end '出价类型',
mcrd.`money` '(出价/调价)金额',
mcrd. `type` '竞价类型',
mcrd.`rank` '预排名',
mcrd.`community_id` '社区ID',
-- mc.`name` '社区名称',
ar.`name` '社区县市',
ase.`name` '社区乡镇',
case when mcrd.`source`=1 then '推荐' when mcrd.`source`=2 then '搜寻' when mcrd.`source`=3 then '收藏' when mcrd.`source`=4 then '上期' 
when mcrd.`source`=5 then '历史' when mcrd.`source`=6 then '续购' when mcrd.`source`=7 then '物件管理页' when mcrd.`source`=8 then '会员中心推荐社区弹窗' when mcrd.`source`=9 then '召集令活动页' when mcrd.`source`=10 then '企业号触屏' when mcrd.`source`=11 then '精准营销弹窗' when mcrd.`source`=12 then '物件刊登成功页' when mcrd.`source`=13 then '物件管理页顶部推荐' when mcrd.`source`=14 then '最新续购' 
when mcrd.`source`=15 then '优质社区推荐'
when mcrd.`source`=16 then '弹窗复购'
when mcrd.`source`=17 then '弹窗續費'
when mcrd.`source`=18 then '中古屋詳情頁PC端'
when mcrd.`source`=19 then '中古屋詳情頁觸屏端'
when mcrd.`source`=20 then '中古屋詳情頁APP端'
when mcrd.`source`=21 then '租屋詳情頁PC端'
when mcrd.`source`=22 then '租屋詳情頁觸屏端'
when mcrd.`source`=23 then '租詳情頁APP端'
when mcrd.`source`=24 then 'PC-会员中心优惠券'
when mcrd.`source`=25 then '触屏-会员中心'
when mcrd.`source`=26 then 'APP-会员中心'
when mcrd.`source`=27 then '四端-金牌专家版位'
when mcrd.`source`=28 then '四端-介绍页'
when mcrd.`source`=29 then '待办事项提醒续费'
when mcrd.`source`=30 then '待办事项体系到期复购'
when mcrd.`source`=31 then 'PC-现金券列表'
when mcrd.`source`=32 then '触屏-现金券列表'
when mcrd.`source`=33 then 'PC-领取成功弹窗社区推荐'
when mcrd.`source`=34 then 'PC-待使用弹窗社区推荐' 
when mcrd.`source`=35 then '物件管理页顶部推荐(物件推荐)'
when mcrd.`source`=37 then '曝光失败弹窗复购'
when mcrd.`source`=38 then '即将到期一键续购'
when mcrd.`source`=39 then '已到期一键续购'
when mcbr.`source`=40 then '即将到期一键续购-触屏'
when mcbr.`source`=41 then '即将到期一键续购-APP'
when mcrd.`source`=101 then '其他'
when mcrd.`source`=102 then 'pc金牌专家购买列表'
when mcrd.`source`=103 then '触屏金牌专家购买列表'
when mcrd.`source`=104 then 'PC物件管理页列表'
when mcrd.`source`=105 then 'PC弹窗引导'
when mcrd.`source`>=100 and mcrd.`source`<=200 then '自定义' else mcrd.`source` end '订单入口来源',
mcrd.`deleted` '是否刪除',  -- ，1、為已刪,0、未未刪
case mcrd.`pay_status` when 1 then '待支付' when 2 then '已支付' when 3 then '退款' when 4 then '取消' when 5 then '失败' else mcrd.`pay_status` end '支付状态',
mcrd.`created_at` '创建时间',
mcrd.`updated_at` '更新时间' 
from t591_new.market_community_agent_bid_record_detail mcrd 
LEFT JOIN t591_new.market_community_agent_bid_record mcbr on mcrd.record_id=mcbr.id and mcrd.user_id=mcbr.user_id 
LEFT JOIN t591_new.market_community_bid_rules mcr on mcbr.`community_id`=mcr.community_id -- and mcbr.period_id=mcr.period_id
LEFT JOIN t591_new.`market_community` mc on mcrd.community_id=mc.id 
left JOIN t591_new.area_region ar on mcr.`regionid`=ar.id
left JOIN t591_new.`area_section` ase on mcr.sectionid=ase.id 
LEFT JOIN t591_new.market_community_agent_order mco on mcrd.oid=mco.id 
LEFT JOIN t591_new.market_voucher_use mvu on mcrd.user_id=mvu.user_id and mcrd.oid=mvu.oid and mvu.oid!=0
LEFT join t591_new.market_voucher mv on mvu.voucher_id=mv.id
LEFT join t591_new.market_voucher_config mvc on mv.config_id=mvc.id 
WHERE mcrd.created_at>='2023-08-21' and mcbr.parent_id!=0
and (mcrd.created_at>=DATE_SUB(CURDATE(),INTERVAL 2 DAY) or mcrd.updated_at>=DATE_SUB(CURDATE(),INTERVAL 2 DAY));

• 库表：t591_new.market_community_agent_bid_record_detail；实例 alias：prod-591/master
• explain SQL：

SELECT * FROM `t591_new`.`market_community_agent_bid_record_detail` WHERE created_at>='2023-08-21' LIMIT 10

• 执行计划（EXPLAIN 表节点，按 JOIN 顺序）：

• 慢因：扫描行数远大于返回行数(4,496,022,073/20,955)、索引范围扫描量过大(market_community_agent_bid_record_detail: key=idx_created_at, rows=3,568,860)
• 建议：补索引（按 WHERE 等值列在前、范围列收尾建复合索引）; 用 EXPLAIN 验证 key 命中

6. SELECT COUNT(*) AS total FROM t591_ivr.ivr_ext_service_call_t591 as a LEFT JOIN t591_ivr.ivr_ext_usr_number as b ON a.number = b.number AND a.send_id = b.send_i —— 523 次 × 10.23s = 1.49h

• 代表性 SQL：

SELECT COUNT(*) AS total FROM t591_ivr.`ivr_ext_service_call_t591` as a LEFT JOIN t591_ivr.`ivr_ext_usr_number` as b ON a.number = b.number AND a.send_id = b.send_id WHERE 1 AND b.the_type=8 AND b.the_id='105149' AND a.status IN('answer','busy','cancel','noanswer') AND a.start_time<='1789919999';

• 库表：t591_ivr.ivr_ext_service_call_t591；实例 alias：prod-591/master
• explain：未执行（Error calling tool 'explain': (1054, "Unknown column 'the_type' in 'where clause'")）
• 慢因：扫描行数远大于返回行数(25,909,088/1)
• 建议：补索引（按 WHERE 等值列在前、范围列收尾建复合索引）; 用 EXPLAIN 验证 key 命中
• 可执行 DDL（建议先在低峰期 EXPLAIN 验证再执行）：

ALTER TABLE `t591_ivr`.`ivr_ext_service_call_t591` ADD INDEX `idx_the_type` (`the_type`);

7. select start_time, user_host, query_time, lock_time, rows_sent, rows_examined, db, sql_text from mysql.slow_log WHERE start_time >= DATE_SUB(NOW(), INTERVAL ? M —— 180 次 × 27.54s = 1.38h

• 代表性 SQL：

select start_time, user_host, query_time, lock_time, rows_sent, rows_examined, db, sql_text from mysql.slow_log WHERE start_time >= DATE_SUB(NOW(), INTERVAL 5 MINUTE) AND start_time <= NOW()

• 库表：mysql.slow_log；实例 alias：None
• explain：未执行（无 alias(该 server 无可连 MCP 实例)）
• 慢因：扫描行数远大于返回行数(2,276,710/110)
• 建议：补索引（按 WHERE 等值列在前、范围列收尾建复合索引）; 用 EXPLAIN 验证 key 命中
• 可执行 DDL（建议先在低峰期 EXPLAIN 验证再执行）：

ALTER TABLE `mysql`.`slow_log` ADD INDEX `idx_start_time` (`start_time`);

8. select * from t591.house_rel where user_id = ? and status = ? and closed = ? order by refreshtime desc limit ?; —— 14 次 × 336.91s = 1.31h

• 代表性 SQL：

select * from `t591`.`house_rel` where `user_id` = 3736 and `status` = 2 and `closed` = 0 order by `refreshtime` desc limit 30;

• 库表：t591.house_rel；实例 alias：prod-591/master
• explain SQL：

select * from `t591`.`house_rel` where `user_id` = 3736 and `status` = 2 and `closed` = 0 order by `refreshtime` desc limit 30;

• 执行计划（EXPLAIN 表节点，按 JOIN 顺序）：

• 慢因：扫描行数远大于返回行数(38,953,095/3)、全索引扫描(house_rel: key=refreshtime, rows=21,583，缺更优过滤索引)
• 建议：补索引（按 WHERE 等值列在前、范围列收尾建复合索引）; 用 EXPLAIN 验证 key 命中; 扩复合索引: 把其余 WHERE 等值列追加到现有索引尾部, 避免 10 万+ 行回表

逐条优化建议汇总

P 行 = 深析模式（指纹聚合，按全天累计耗时降序 P1 最大，是优化主战场）；T 行 = 单条耗时 Top3 的一次性慢 SQL（多为 bi/导出查询，治理手段通常是限流/降频/移到从库，而非建索引）。

*采集脚本 .agents/scripts/mysql_slow_prod_report.py，中间数据 outputs/slow_report_prod591_20260921.json；全程只读。*