Setup the buffer page size from config on start

[abyss7]

Changelog entry

The new config option is buffer_page_alloc_size with default 4Kb

Changelog category

• Performance improvement

Description for reviewers

...

[github-actions]

🟢 2025-06-17 10:41:01 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-06-17 10:41:45 UTC Pre-commit check linux-x86_64-release-asan for 57824b5 has started.
⚪ 2025-06-17 10:42:10 UTC Artifacts will be uploaded here
⚪ 2025-06-17 10:46:41 UTC ya make is running...
🔴 2025-06-17 12:58:40 UTC Too many tests failed, NOT going to retry
🟡 2025-06-17 13:05:35 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
16024	12690	0	2810	486	38

🟢 2025-06-17 13:07:09 UTC Build successful.
🔴 2025-06-17 13:07:52 UTC ydbd size 3.9 GiB changed* by +3.4 MiB, which is >= 2.0 MiB vs main: Alert

ydbd size dash	main: 0ca2955	merge: 57824b5	diff	diff %
ydbd size	4 167 354 616 Bytes	4 170 888 224 Bytes	+3.4 MiB	+0.085%
ydbd stripped size	1 446 053 048 Bytes	1 446 789 528 Bytes	+719.2 KiB	+0.051%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-06-17 10:41:52 UTC Pre-commit check linux-x86_64-relwithdebinfo for 57824b5 has started.
⚪ 2025-06-17 10:42:04 UTC Artifacts will be uploaded here
⚪ 2025-06-17 10:45:42 UTC ya make is running...
🔴 2025-06-17 13:00:30 UTC Too many tests failed, NOT going to retry
🔴 2025-06-17 13:25:57 UTC Some tests failed, follow the links below.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38308	22919	0	11582	3746	61

🟢 2025-06-17 13:29:53 UTC Build successful.
🟢 2025-06-17 13:30:36 UTC ydbd size 2.2 GiB changed* by +5.0 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 7eb7f65	merge: 57824b5	diff	diff %
ydbd size	2 371 138 248 Bytes	2 371 143 384 Bytes	+5.0 KiB	+0.000%
ydbd stripped size	497 369 576 Bytes	497 370 600 Bytes	+1.0 KiB	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-06-22 21:02:31 UTC Pre-commit check linux-x86_64-relwithdebinfo for ce1ba2a has started.
⚪ 2025-06-22 21:02:43 UTC Artifacts will be uploaded here
⚪ 2025-06-22 21:06:37 UTC ya make is running...
🟡 2025-06-22 22:55:58 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
38457	35743	0	3	2663	48

⚪ 2025-06-22 22:59:21 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-06-22 23:15:09 UTC Tests successful.

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
490 (only retried tests)	459	0	0	0	31

🟢 2025-06-22 23:15:18 UTC Build successful.
🟢 2025-06-22 23:15:39 UTC ydbd size 2.2 GiB changed* by +6.1 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: ecb9d76	merge: ce1ba2a	diff	diff %
ydbd size	2 378 944 072 Bytes	2 378 950 312 Bytes	+6.1 KiB	+0.000%
ydbd stripped size	498 353 192 Bytes	498 354 632 Bytes	+1.4 KiB	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-06-22 21:02:38 UTC Pre-commit check linux-x86_64-release-asan for ce1ba2a has started.
⚪ 2025-06-22 21:02:49 UTC Artifacts will be uploaded here
⚪ 2025-06-22 21:06:40 UTC ya make is running...
🟡 2025-06-22 23:33:41 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
16160	15820	0	119	196	25

⚪ 2025-06-22 23:35:04 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-06-23 00:18:45 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1949 (only retried tests)	1672	0	80	170	27

⚪ 2025-06-23 00:19:04 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-06-23 00:59:42 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1604 (only retried tests)	1328	0	74	175	27

🟢 2025-06-23 00:59:59 UTC Build successful.
🟢 2025-06-23 01:00:39 UTC ydbd size 3.9 GiB changed* by +12.2 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: ecb9d76	merge: ce1ba2a	diff	diff %
ydbd size	4 185 150 376 Bytes	4 185 162 904 Bytes	+12.2 KiB	+0.000%
ydbd stripped size	1 450 983 384 Bytes	1 450 988 248 Bytes	+4.8 KiB	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}