Fixed an error in calculating metrics in the PQ tablet (#29321)

[nshestakov]

Changelog entry

Fixed an error in calculating metrics in the PQ tablet, as a result of which the resource usage was incorrectly determined, which led to unnecessary balancing of tablets.

Changelog category

• Bugfix

Description for reviewers

LOGBROKER-10121

[github-actions]

🟢 2025-11-24 10:23:03 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-11-24 10:24:10 UTC Pre-commit check linux-x86_64-release-asan for fb812b7 has started.
⚪ 2025-11-24 10:24:25 UTC Artifacts will be uploaded here
⚪ 2025-11-24 10:28:23 UTC ya make is running...
🟡 2025-11-24 12:55:52 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?
17443	16997	0	137	294	15

🟢 2025-11-24 12:57:16 UTC Build successful.
🟢 2025-11-24 12:57:46 UTC ydbd size 3.8 GiB changed* by +8.0 KiB, which is < 100.0 KiB vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: 848999b	merge: fb812b7	diff	diff %
ydbd size	4 054 180 192 Bytes	4 054 188 400 Bytes	+8.0 KiB	+0.000%
ydbd stripped size	1 510 982 080 Bytes	1 510 987 520 Bytes	+5.3 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]

⚪ 2025-11-24 10:26:26 UTC Pre-commit check linux-x86_64-relwithdebinfo for fb812b7 has started.
⚪ 2025-11-24 10:26:40 UTC Artifacts will be uploaded here
⚪ 2025-11-24 10:30:31 UTC ya make is running...
🟡 2025-11-24 12:26:53 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
40132	37450	0	10	2650	22

⚪ 2025-11-24 12:30:10 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-11-24 12:46:05 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
692 (only retried tests)	678	0	0	0	14

🟢 2025-11-24 12:46:13 UTC Build successful.
🟢 2025-11-24 12:46:30 UTC ydbd size 2.3 GiB changed* by -896 Bytes, which is <= 0 Bytes vs stable-25-3-1: OK

ydbd size dash	stable-25-3-1: 848999b	merge: fb812b7	diff	diff %
ydbd size	2 436 384 680 Bytes	2 436 383 784 Bytes	-896 Bytes	-0.000%
ydbd stripped size	521 745 832 Bytes	521 746 088 Bytes	+256 Bytes	+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}