Stable-25-3 Reject Probability in Column Shards

[neyrox]

Changelog entry

Added Reject Probability to help prevent overloads:

• Reject operations in column shards by probability Reject operations in column shards by probability #26783
• Move MaxTxInFly to ICB Move MaxTxInFly to ICB #27635

Changelog category

• New feature

Description for reviewers

[github-actions]

🟢 2025-10-31 10:01:29 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-10-31 10:02:10 UTC Pre-commit check linux-x86_64-release-asan for 45e3d7d has started.
⚪ 2025-10-31 10:02:25 UTC Artifacts will be uploaded here
⚪ 2025-10-31 10:06:24 UTC ya make is running...
🟡 2025-10-31 12:51:57 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?
17807	17323	0	176	291	17

🟢 2025-10-31 12:53:24 UTC Build successful.
🟢 2025-10-31 12:53:47 UTC ydbd size 3.8 GiB changed* by +33.2 KiB, which is < 100.0 KiB vs stable-25-3: OK

ydbd size dash	stable-25-3: 7780ff5	merge: 45e3d7d	diff	diff %
ydbd size	4 059 849 576 Bytes	4 059 883 600 Bytes	+33.2 KiB	+0.001%
ydbd stripped size	1 513 052 384 Bytes	1 513 066 624 Bytes	+13.9 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}

[github-actions]

⚪ 2025-10-31 10:02:16 UTC Pre-commit check linux-x86_64-relwithdebinfo for 45e3d7d has started.
⚪ 2025-10-31 10:02:34 UTC Artifacts will be uploaded here
⚪ 2025-10-31 10:06:53 UTC ya make is running...
🟡 2025-10-31 12:41:39 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
40529	37834	0	15	2653	27

⚪ 2025-10-31 12:45:06 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-10-31 13:06:21 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
810 (only retried tests)	786	0	2	1	21

⚪ 2025-10-31 13:06:32 UTC ya make is running... (failed tests rerun, try 3)
🔴 2025-10-31 13:23:48 UTC Some tests failed, follow the links below.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
536 (only retried tests)	519	0	1	0	16

🟢 2025-10-31 13:23:57 UTC Build successful.
🟢 2025-10-31 13:24:17 UTC ydbd size 2.3 GiB changed* by +15.1 KiB, which is < 100.0 KiB vs stable-25-3: OK

ydbd size dash	stable-25-3: 7780ff5	merge: 45e3d7d	diff	diff %
ydbd size	2 439 198 496 Bytes	2 439 213 936 Bytes	+15.1 KiB	+0.001%
ydbd stripped size	522 216 456 Bytes	522 219 240 Bytes	+2.7 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}