Observing unbounded memory usage with pruning settings

[zmanian]

Summary of Bug

I'm observing unbounded growth in memory usage with the following pruning settings on game of zones hub 3.

I also have sentry nodes running prune everything and archives nodes. Memory usage appears to be stable on them.

# Pruning sets the pruning strategy: syncable, nothing, everything, custom
# syncable: only those states not needed for state syncing will be deleted (keeps last 100 + every 10000th)
# nothing: all historic states will be saved, nothing will be deleted (i.e. archiving node)
# everything: all saved states will be deleted, storing only the current state
# custom: allows fine-grained control through the pruning-keep-every and pruning-snapshot-every options.
pruning = "custom"

# These are applied if and only if the pruning strategy is custom.
pruning-keep-every = "1"
pruning-snapshot-every = "10000"

Version

github.com/cosmos/cosmos-sdk v0.34.4-0.20200530180557-ba70f4d4dc2e

Steps to Reproduce

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For Admin Use

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[tac0turtle]

An issue has been opened in IAVL as well: cosmos/iavl#256

[alexanderbez]

I would close this issue in favor of the one reported in the IAVL repo.