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Liquibase: two instances calling update() at the same moment
================================================================
captured: 2026-09-15T07:07:26.705434740Z

instance A update() took 874ms
instance B update() took 10097ms
wall-clock time for both, run concurrently: 10099ms

-- databasechangeloglock after both finished --
ID | LOCKED | LOCKEDBY
---+--------+---------
1  | false  | NULL    
(1 row)

-- databasechangelog after both finished --
ID            | AUTHOR | EXECTYPE
--------------+--------+---------
1-slow-change | ankurm | EXECUTED
(1 row)