store/copr: remove useless ticker for performance

[crazycs520]

What problem does this PR solve?

Issue Number: ref #57580

Problem Summary: remove useless ticker for performance

What changed and how does it work?

This pr removes this useless ticker. In current implementation, if the SQL is been killed, then ctx.Done will work, so no need the ticker.

And remove it is for performance, following is the sysbench oltp_index_scan test, and the range size is 2:

sysbench --config-file=sysbench.conf oltp_index_scan --tables=16 --table-size=1000000 --threads=128 --range-size=2 run

The example query is like this:

SELECT
  k
FROM
  sbtest1
WHERE
  k BETWEEN ?
  AND ? [arguments: (503925, 503926)]

Which Plan is:

| id                 | estRows | estCost | actRows | task      | access object               | execution info                                                                                                                                                                                                                                                                                         | operator info                           | memory    | disk  |
| IndexReader_6      | 2.07    | 31.20   | 2       | root      |                             | time:1.31ms, loops:2, cop_task: {num: 1, max: 1.15ms, proc_keys: 2, tot_proc: 81.2µs, tot_wait: 575.8µs, copr_cache: disabled, build_task_duration: 12.2µs, max_distsql_concurrency: 1}, rpc_info:{Cop:{num_rpc:1, total_time:1.12ms}}                                                                 | index:IndexRangeScan_5                  | 278 Bytes | N/A   |
| └─IndexRangeScan_5 | 2.07    | 336.86  | 2       | cop[tikv] | table:sbtest1, index:k_1(k) | tikv_task:{time:0s, loops:1}, scan_detail: {total_process_keys: 2, total_process_keys_size: 92, total_keys: 3, get_snapshot_time: 539.6µs, rocksdb: {key_skipped_count: 2, block: {cache_hit_count: 6}}}, time_detail: {total_process_time: 81.2µs, total_wait_time: 575.8µs, tikv_wall_time: 751.3µs} | range:[503925,503926], keep order:false | N/A       | N/A   |

Version	workload	sub-cmd	Thread	QPS	AVG Duration	QPS Increase
Master	Sysbench	oltp_index_scan	128	80285	1.59	0%
This PR	Sysbench	oltp_index_scan	128	82009	1.56	2.1%

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.4613%. Comparing base (2ff351d) to head (d5faf48).
Report is 12 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #57558        +/-   ##
================================================
+ Coverage   72.8166%   73.4613%   +0.6447%     
================================================
  Files          1676       1676                
  Lines        463603     463630        +27     
================================================
+ Hits         337580     340589      +3009     
+ Misses       105179     102293      -2886     
+ Partials      20844      20748        -96     

Flag	Coverage Δ
integration	43.4779% <ø> (?)
unit	72.2713% <ø> (+0.0636%)	⬆️

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Components	Coverage Δ
dumpling	52.7673% <ø> (ø)
parser	∅ <ø> (∅)
br	45.4049% <ø> (+0.0060%)	⬆️

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[crazycs520]

/retest-required

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tiancaiamao, zyguan

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-11-21 08:07:41.810853871 +0000 UTC m=+105449.430508384: ☑️ agreed by tiancaiamao.
• 2024-11-21 09:08:49.337041934 +0000 UTC m=+109116.956696446: ☑️ agreed by zyguan.