Hi,
Andres Freund wrote 2021-05-31 00:07:
Hi,
On 2021-05-30 03:10:26 +0300, Yura Sokolov wrote:
While this result is not directly applied to stock PostgreSQL, I
believe
page compression is important for full_page_writes with
wal_compression
enabled. And probably when PostgreSQL is used on fi
Hi,
On 2021-05-30 03:10:26 +0300, Yura Sokolov wrote:
> While this result is not directly applied to stock PostgreSQL, I believe
> page compression is important for full_page_writes with wal_compression
> enabled. And probably when PostgreSQL is used on filesystem with
> compression enabled (ZFS?)
Hi,
I happened to be running some postgres on zfs on Linux/aarch64 tests
and tested this patch.
Kernel: 4.18.0-305.el8.aarch64
CPU: 16x3.0GHz Ampere Alta / Arm Neoverse N1 cores
ZFS: 2.1.0-rc6
ZFS options: options spl spl_kmem_cache_slab_limit=65536 (see:
https://github.com/openzfs/zfs/issues/12
Hello Yura,
didn't measure impact on raw performance yet.
Must be done. There c/should be a guc to control this behavior if the
performance impact is noticeable.
--
Fabien.
pact.
Sorry, didn't measure impact on raw performance yet.
regards,
Yura Sokolov aka funny_falconcommit 6abfcaeb87fcb396c5e2dccd434ce2511314ff76
Author: Yura Sokolov
Date: Sun May 30 02:39:17 2021 +0300
Clear empty space in a page
Write zeroes to just cleared
