Persistent buffer chunk allocation

[Evgenik2]

Changelog entry

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Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

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[ydbot]

Run Extra Tests

Run additional tests for this PR. You can customize:

• Test Size: small, medium, large (default: all)
• Test Targets: any directory path (default: ydb/)
• Sanitizers: ASAN, MSAN, TSAN
• Coredumps: enable for debugging (default: off)
• Additional args: custom ya make arguments

[github-actions]

⚪ 2026-01-28 14:14:26 UTC Pre-commit check linux-x86_64-release-asan for 8a1c6d3 has started.
⚪ 2026-01-28 14:14:44 UTC Artifacts will be uploaded here
⚪ 2026-01-28 14:17:14 UTC ya make is running...
⚫ 2026-01-28 14:46:26 UTC Check cancelled

[github-actions]

🟢 2026-01-28 14:14:46 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2026-01-28 14:15:52 UTC Pre-commit check linux-x86_64-relwithdebinfo for 8a1c6d3 has started.
⚪ 2026-01-28 14:16:12 UTC Artifacts will be uploaded here
⚪ 2026-01-28 14:18:32 UTC ya make is running...
⚫ 2026-01-28 14:46:27 UTC Check cancelled

[github-actions]

⚪ 2026-01-28 14:48:02 UTC Pre-commit check linux-x86_64-release-asan for c2d461d has started.
⚪ 2026-01-28 14:48:19 UTC Artifacts will be uploaded here
⚪ 2026-01-28 14:50:33 UTC ya make is running...
🟡 2026-01-28 16:17:43 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
16158	16053	0	65	10	30

🟢 2026-01-28 16:17:55 UTC Build successful.
🟢 2026-01-28 16:18:28 UTC ydbd size 3.9 GiB changed* by +55.4 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: b086d72	merge: c2d461d	diff	diff %
ydbd size	4 156 471 656 Bytes	4 156 528 344 Bytes	+55.4 KiB	+0.001%
ydbd stripped size	1 554 793 712 Bytes	1 554 819 056 Bytes	+24.8 KiB	+0.002%

^{*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]

⚪ 2026-01-28 14:51:01 UTC Pre-commit check linux-x86_64-relwithdebinfo for c2d461d has started.
⚪ 2026-01-28 14:52:09 UTC Artifacts will be uploaded here
⚪ 2026-01-28 14:54:22 UTC ya make is running...
🟡 2026-01-28 17:04:01 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
47333	44247	0	5	3048	33

⚪ 2026-01-28 17:04:19 UTC ya make is running... (failed tests rerun, try 2)
🟢 2026-01-28 17:09:58 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
421 (only retried tests)	410	0	0	0	11

🟢 2026-01-28 17:10:05 UTC Build successful.
🟢 2026-01-28 17:10:28 UTC ydbd size 2.4 GiB changed* by +33.1 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 94b36e5	merge: c2d461d	diff	diff %
ydbd size	2 527 424 336 Bytes	2 527 458 256 Bytes	+33.1 KiB	+0.001%
ydbd stripped size	536 257 576 Bytes	536 265 288 Bytes	+7.5 KiB	+0.001%

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