aykut-bozkurt

* Added global lock to prevent concurrent nonblocking shard split operations because we share memory and replication slots with nonblocking split ops, * Refactored SplitShard method to accept distribution column,...

* Create colocation entry with colocate_with => 'none', #6227, * Do not create colocation entry for reference tables in EnsureReferenceTablesOnAllNodes, #6224,

1. Those locks that are accumulating on the coordinator are normal. They are not that much even for a huge cluster, so it does not cause any failure. We verified...

I found out one place where we accumulate locks on the coordinator. `extern_IsColumnarTableAmTable` points to `IsColumnarTableAmTable` which acquires lock on the relation without releasing it. See below: ``` if (accessMethod...

> ```shell > pgbench -c 4 -T 100 -h 127.0.0.1 -p 5433 -f update.sql > ``` I think I know the problem here. You distribute the table against the column...