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base repository: postgresql-cfbot/postgresql
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base: cf/6266~1
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head repository: postgresql-cfbot/postgresql
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compare: cf/6266
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  • 3 commits
  • 5 files changed
  • 2 contributors

Commits on Dec 12, 2025

  1. Add configurable receive buffer size 

    This commit introduces a new GUC parameter 'pq_recv_buffer_size' to allow
users to configure the size of the network receive buffer for each backend
connection. The receive buffer is now dynamically allocated instead of
using a fixed compile-time size.

Key changes:
- Make PqRecvBuffer dynamically allocated based on pq_recv_buffer_size GUC
- Add pq_recv_buffer_size GUC parameter (default 8KB, min 8KB, max configurable)
  has enough space

Benefits:
- Configurable buffer size allows tuning for workloads with large messages
- Maintains backward compatibility with 8KB default
    @fila43
    fila43 authored and Commitfest Bot committed Dec 12, 2025
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  2. Remove dead memmove code from pq_recvbuf() 

    The memmove block in pq_recvbuf() is unreachable dead code that has
never been executed in practice.

Analysis:
pq_recvbuf() is only called from pq_getbytes() when the condition
PqRecvPointer >= PqRecvLength is true (buffer is empty or exhausted).

However, the memmove is only executed when PqRecvLength > PqRecvPointer
(buffer contains unread data).

These conditions are mutually exclusive:
  - Caller requires: PqRecvPointer >= PqRecvLength
  - memmove requires: PqRecvLength > PqRecvPointer
    @fila43
    fila43 authored and Commitfest Bot committed Dec 12, 2025
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  3. [CF 6266] Better Performance for PostgreSQL with large INSERTs 

    This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/6266

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/CAFjYY+JTULmdQUJcBK-hDGRSWZy0e+RFHrCy3vp9J1pCQ18+Ew@mail.gmail.com
Author(s): Filip Januš
    Commitfest Bot committed Dec 12, 2025
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