db2快照

一、获取快照日志

#1.查看数据库编目

db2 list db directory

#2.attach 到要分析的数据库

db2 attach to pm1_9 user db2dev

#3.connect 到要分析的数据

db2 connect to pm1_9 user db2dev

#4.抓取快照

db2 get snapshot for all on pm1_9 > /tmp/snap.out

二、分析日志

#1.Rows Read大的表定位

grep -ni "Rows Read" /tmp/snap.out | grep -v "Not Collected" | sort -k 5rn | more

#2.执行次数多的sql

grep -ni "Number of executions" /tmp/snap.out | sort -k 6rn  | more