There are two types of queries in a slow log:
1. SELECT /*!40001 SQL_NO_CACHE */ * FROM <table> (2 queries)
2. INSERT INTO <table> (4k queries)
Nevertheless pt-query-digest reports this statistics:
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 0 751
# Exec time 20 198s 44us 29s 264ms 501ms 2s 84us
# Lock time 0 20ms 16us 140us 26us 42us 8us 22us
# Rows sent 48 31.81M 0 10.79M 43.38k 59.57k 467.31k 9.83
# Rows examine 13 31.81M 0 10.79M 43.38k 59.57k 467.31k 9.83
# Query size 0 43.21k 45 79 58.92 69.19 6.27 56.92
# String:
# Databases <db1> (173/23%), <db2> (98/13%)... 32 more
# Hosts localhost
# Users <user>
# Query_time distribution
# 1us
# 10us ################################################################
# 100us ####################
# 1ms ##########
# 10ms ###########
# 100ms #########
# 1s ###
# 10s+ #
Count 751 neither corresponds to SELECT nor to INSERT.
I can't reproduce it.
$ pt-query-digest --version
pt-query-digest 2.2.10
$ awk '{for (i=1;i<=NF;i++) if ( $i == "INSERT") c++}END {print c}' /var/lib/
105
$ cat /var/lib/
# Profile
# Rank Query ID Response time Calls R/Call V/M Item
# ==== ================== ============= ===== ====== ===== ==========
# 1 0xCAEC22E79B0EFD3B 1.8842 97.5% 105 0.0179 0.00 INSERT t?
# MISC 0xMISC 0.0488 2.5% 21 0.0023 0.0 <10 ITEMS>
# Query 1: 52.50 QPS, 0.94x concurrency, ID 0xCAEC22E79B0EFD3B at byte 40611
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2014-09-04 02:50:04 to 02:50:06
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 83 105
# Exec time 97 2s 13ms 32ms 18ms 28ms 4ms 16ms
# Lock time 9 2ms 12us 51us 17us 27us 5us 15us
Count total 105 reflects total 105 inserts correctly. What pt-query-digest version you used ? Can you attach your slow query log file to check with it.