我正在使用 pt-query-digest 来分析 mysql binlog。不幸的是，我在 pt-query-digest 文档中找不到关于报告中“查询大小”行的任何描述。我想，这个特性与查询输出大小有关，但它是一个 UPDATE 语句，而不是 SELECT。
# Query 2: 235.21 QPS, 52.92x concurrency, ID 0x7ABED476DE0F9BF3 at byte 652451215
# This item is included in the report because it matches --limit.
# Scores: V/M = 29.85
# Time range: 2017-03-30 15:56:22 to 16:30:19
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 9 479132
# Exec time 45 107792s 0 51s 225ms 0 3s 0
# Query size 28 127.99M 266 283 280.11 271.23 2.44 271.23
# error code 0 0 0 0 0 0 0 0
# String:
# Databases dbname
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s #################################
# 10s+ ################################################################
# Tables
# SHOW TABLE STATUS FROM `dbname` LIKE 'tblname'\G
# SHOW CREATE TABLE `dbname`.`tblname`\G
UPDATE `tblname`
SET `field1` = 100,
`time` = NOW()
WHERE `field2` = 1
AND `field3` = 2
AND `field4` = 3
AND `field5` = 0
这样做的目的是什么？
最佳答案
Query size ... 是查询的字节大小
在你的例子中它是字符串的字节大小
"UPDATE `tblname`
SET `field1` = 100,
`time` = NOW()
WHERE `field2` = 1
AND `field3` = 2
AND `field4` = 3
AND `field5` = 0"
关于mysql - pt-query-digest:什么是 "Query size"？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43178665/