Timeline of memory after heavy CRUD operations:

t=0min  (peak load):     117 MB
t=2min  (idle):          105 MB  (GC started reclaiming)
t=5min  (idle):           98 MB  (major GC cycle)
t=10min (idle):           88 MB  (stabilized near baseline)
t=15min (idle):           88 MB  (no further growth)

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