Adam Lee

Above `reuse` are different (local-IP-address, local-port, foreign-IP-address, foreign-port) 4-tuple. I did another experiment to check if Greenplum with this PR will reuse the ports in the exact same 4-tuple, but...

Yes, based on the current experiment result, socket document, and Linux kernel codes, SO_REUSEADDR doesn't take effect at outgoing TCP requests. I will close this in several days if there...

> > psql: error: FATAL: interconnect error: Could not set up udp listener socket > > I'm a little confused, this error is related to UDP (not available port), not...

+1 to do this, wait for others' comments. FYI, `git blame --ignore-revs-file` could ignore some commits, or `git config`'s `blame.ignoreRevsFile`.

or `.git-blame-ignore-revs` file.

@z-wenlin you did some related work, take this a look?

The hash key of motion is suspicious. ``` # explain SELECT array_agg(DISTINCT (class)::TEXT) AS class, array_agg(DISTINCT (id)::TEXT) AS id, array_agg(DISTINCT (sex)::TEXT) AS sex FROM abalone_special_char2; QUERY PLAN ---------------------------------------------------------------------------------------------------------------- Finalize Aggregate...

How is this PR going?

@Aegeaner and I both think this PR needs more care, we two need more time to refactor the cdb instruments used by explain. Mark it as a draft for now.

@soumyadeep2007 Sure, it's on our backlog, I have noted all the related issues mentioned by this PR or not. I will schedule it.