Fetching historgrams from statistics service for CBO

[pavelvelikhov]

Changelog entry

Optimizer now fetches histograms for better CBO quality

Changelog category

• Improvement

Description for reviewers

...

[github-actions]

⚪ 2025-12-23 15:35:47 UTC Pre-commit check linux-x86_64-release-asan for cfe3e20 has started.
⚪ 2025-12-23 15:36:24 UTC Artifacts will be uploaded here
⚪ 2025-12-23 15:38:23 UTC ya make is running...
⚫ 2025-12-23 16:03:09 UTC Check cancelled

[github-actions]

⚪ 2025-12-23 15:36:18 UTC Pre-commit check linux-x86_64-relwithdebinfo for cfe3e20 has started.
⚪ 2025-12-23 15:36:37 UTC Artifacts will be uploaded here
⚪ 2025-12-23 15:38:46 UTC ya make is running...
⚫ 2025-12-23 16:03:11 UTC Check cancelled

[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]

🟢 2025-12-23 15:38:30 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-12-23 16:06:25 UTC Pre-commit check linux-x86_64-relwithdebinfo for 9d230e6 has started.
⚪ 2025-12-23 16:06:43 UTC Artifacts will be uploaded here
⚪ 2025-12-23 16:08:57 UTC ya make is running...
🔴 2025-12-23 16:12:27 UTC Build failed, see the logs. Also see fail summary

[github-actions]

⚪ 2025-12-23 17:28:31 UTC Pre-commit check linux-x86_64-release-asan for 36060cc has started.
⚪ 2025-12-23 17:29:21 UTC Artifacts will be uploaded here
⚪ 2025-12-23 17:31:42 UTC ya make is running...
🟡 2025-12-23 18:44:09 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?
14200	14082	0	89	11	18

🟢 2025-12-23 18:44:18 UTC Build successful.
🟢 2025-12-23 18:44:49 UTC ydbd size 3.8 GiB changed* by +35.5 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 7a46c62	merge: 36060cc	diff	diff %
ydbd size	4 086 795 328 Bytes	4 086 831 648 Bytes	+35.5 KiB	+0.001%
ydbd stripped size	1 530 347 384 Bytes	1 530 360 216 Bytes	+12.5 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}

[github-actions]

⚪ 2025-12-23 17:29:08 UTC Pre-commit check linux-x86_64-relwithdebinfo for 36060cc has started.
⚪ 2025-12-23 17:29:51 UTC Artifacts will be uploaded here
⚪ 2025-12-23 17:32:02 UTC ya make is running...
🟡 2025-12-23 19:34:53 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?
44589	40993	0	183	3382	31

⚪ 2025-12-23 19:35:11 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-12-23 20:14:29 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1866 (only retried tests)	1854	0	1	0	11

⚪ 2025-12-23 20:14:36 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-12-23 20:18:37 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1202 (only retried tests)	1192	0	0	0	10

🟢 2025-12-23 20:18:44 UTC Build successful.
🟢 2025-12-23 20:19:10 UTC ydbd size 2.3 GiB changed* by +22.2 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 7a46c62	merge: 36060cc	diff	diff %
ydbd size	2 486 521 800 Bytes	2 486 544 488 Bytes	+22.2 KiB	+0.001%
ydbd stripped size	529 311 712 Bytes	529 315 680 Bytes	+3.9 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}