| From: | Amit Kapila <akapila(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Fix memory leak in SnapBuildSerialize. |
| Date: | 2021-01-13 04:17:58 |
| Message-ID: | E1kzXba-0002DE-42@gemulon.postgresql.org |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-committers |
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: funnyxj(dot)fxj(at)alibaba-inc(dot)com
Diagnosed-by: funnyxj(dot)fxj(at)alibaba-inc(dot)com
Author: Amit Kapila
Backpatch-through: 9.5
Discussion: https://postgr.es/m/033ab54c-6393-42ee-8ec9-2b399b5d8cde.funnyxj.fxj@alibaba-inc.com
Branch
------
REL9_6_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/f2b268ee0626286d15a1eaa78fe1704811d51cd4
Modified Files
--------------
src/backend/replication/logical/snapbuild.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Thomas Munro | 2021-01-13 06:37:00 | pgsql: Don't use elog() in src/port/pwrite.c. |
| Previous Message | Amit Kapila | 2021-01-13 02:32:54 | pgsql: Optimize DropRelFileNodesAllBuffers() for recovery. |