Hi all, I'm getting really slow transaction performance, it never gets above about 1/sec. I'm testing with

bin/pulsar-perf transaction --topics-c dev/testns/test --topics-p dev/testns/test -threads 1 -ntxn 50 -ss testSub  -nmp 1 -nmc 1

, which on a standalone docker cluster gets a few hundred a second without an issue. Any suggestions for where to look for the cause? There's very little in the logs on broker or bookies related to it, nothing helpful to me at least. It does seem to be a new thing, I don't recall ever running into problems on this cluster before, but there's been no config changes to my knowledge. Broker pods haven't been restarted in over a month so there's certainly no change to config files, and I'm testing in a new namespace so settings are at default there.