pgsql: Fix memory leak in SnapBuildSerialize.

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pgsql: Fix memory leak in SnapBuildSerialize.

Amit Kapila-3
Fix memory leak in SnapBuildSerialize.

The memory for the snapshot was leaked while serializing it to disk during
logical decoding. This memory will be freed only once walsender stops
streaming the changes. This can lead to a huge memory increase when master
logs Standby Snapshot too frequently say when the user is trying to create
many replication slots.

Reported-by: [hidden email]
Diagnosed-by: [hidden email]
Author: Amit Kapila
Backpatch-through: 9.5
Discussion: https://postgr.es/m/033ab54c-6393-42ee-8ec9-2b399b5d8cde.funnyxj.fxj@...

Branch
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REL_10_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/636b6f99c215217b7e112dc2a97ff1a12f0bd21e

Modified Files
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src/backend/replication/logical/snapbuild.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)