I collected queries on our Master using the following tcpdump command:
tcpdump -i any -s 65535 -x -n -nn -q -tttt 'port 3306' > tcpdump.tcp
The queries are executed amongst several databases.
I then ran this file through pt-query-digest using the following command:
pt-query-digest --output=slowlog --no-report --sample 100 --type tcpdump tcpdump.tcp > slow.log
Then I ran pt-upgrade against two Slaves like this:
pt-upgrade --user user --ask-pass --run-time=1h --upgrade-table percona.pt_upgrade h=10.1.1.1 h=10.1.1.2 slow.log
But I got a bunch of failures since it does not appear to specify which database the query should be executed against.
How is one supposed to use pt-upgrade when queries are collected amongst multiple DBs? AFAICT this isn't specified in the documentation anywhere.
Are you supposed to use --filter with pt-query-digest to just output queries for a particular database and then specify --database with pt-upgrade? Rinse and repeat per database.
It takes several hours to parse my gigantic tcpdump capture so any guidance here is appreciated.
I used this article as a starting point but it is outdated. e.g. pt-query-digest doesn't have a --print option anymore.