database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-25 12:03:53 +03:00
Code Activity

Improve memory use in logical replication apply

Browse Source 
Previously, the memory used by the logical replication apply worker for
processing messages would never be freed, so that could end up using a
lot of memory.  To improve that, change the existing ApplyContext memory
context to ApplyMessageContext and reset that after every
message (similar to MessageContext used elsewhere).  For consistency of
naming, rename the ApplyCacheContext to ApplyContext.

Author: Stas Kelvich <s.kelvich@postgrespro.ru>
This commit is contained in:
Peter Eisentraut
2017-05-09 14:40:42 -04:00
parent e0bf16060b
commit 489b96e80b
3 changed files with 40 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/backend/utils/mmgr/README
View File

@@ -265,6 +265,17 @@ from prepared statements simply reference the prepared statements' trees,
and don't actually need any storage allocated in their private contexts.
Logical Replication Worker Contexts
-----------------------------------
ApplyContext --- permanent during whole lifetime of apply worker. It
is possible to use TopMemoryContext here as well, but for simplicity
of memory usage analysis we spin up different context.
ApplyMessageContext --- short-lived context that is reset after each
logical replication protocol message is processed.
Transient Contexts During Execution
-----------------------------------