log-backup: set gc disable when restore log

[joccau]

Signed-off-by: joccau zak.zhao@pingcap.com

What problem does this PR solve?

Issue Number: close #39602

Problem Summary:
The restoring data is gc when pitr. because the process of applying kv-events is concurrent and the kv-events is not sorted by tso.

What is changed and how it works?

• Disable gc when pitr by set config tikv gc.ratio-threshold= -1.0

Check List

Tests

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

Manual tesst

1. During PITR

MySQL [(none)]> show config where name = 'gc.ratio-threshold';
+------+-------------------+--------------------+-------+
| Type | Instance          | Name               | Value |
+------+-------------------+--------------------+-------+
| tikv | 172.16.6.47:13460 | gc.ratio-threshold | -1    |
| tikv | 172.16.6.35:3460  | gc.ratio-threshold | -1    |
| tikv | 172.16.6.35:13460 | gc.ratio-threshold | -1    |
| tikv | 172.16.6.46:13460 | gc.ratio-threshold | -1    |
| tikv | 172.16.6.46:3460  | gc.ratio-threshold | -1    |
| tikv | 172.16.6.47:3460  | gc.ratio-threshold | -1    |
+------+-------------------+--------------------+-------+

2. finish PITR

MySQL [(none)]> show config where name = 'gc.ratio-threshold';
+------+-------------------+--------------------+-------+
| Type | Instance          | Name               | Value |
+------+-------------------+--------------------+-------+
| tikv | 172.16.6.47:3460  | gc.ratio-threshold | 1.1   |
| tikv | 172.16.6.47:13460 | gc.ratio-threshold | 1.1   |
| tikv | 172.16.6.35:3460  | gc.ratio-threshold | 1.1   |
| tikv | 172.16.6.35:13460 | gc.ratio-threshold | 1.1   |
| tikv | 172.16.6.46:13460 | gc.ratio-threshold | 1.1   |
| tikv | 172.16.6.46:3460  | gc.ratio-threshold | 1.1   |
+------+-------------------+--------------------+-------+

3. admin check table after PITR finished

MySQL [(none)]> admin check table flashback.user_data1;
Query OK, 0 rows affected (1.61 sec)

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.

Disable GC when restore log(PITR) and Enable GC when finish PITR.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• Leavrth
• YuJuncen

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[joccau]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 63a3078

[joccau]

/run-unit-test

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39763.

[sre-bot]

TiDB MergeCI notify

🔴 Bad News! New failing [2] after this pr merged.
These new failed integration tests seem to be caused by the current PR, please try to fix these new failed integration tests, thanks!

CI Name	Result	Duration	Compare with Parent commit
idc-jenkins-ci-tidb/integration-common-test	🟥 failed 1, success 16, total 17	19 min	New failing
idc-jenkins-ci-tidb/sqllogic-test-1	🟥 failed 1, success 25, total 26	6 min 21 sec	New failing
idc-jenkins-ci/integration-cdc-test	🔴 failed 1, success 39, total 40	21 min	Existing failure
idc-jenkins-ci-tidb/sqllogic-test-2	✅ all 28 tests passed	5 min 1 sec	Fixed
idc-jenkins-ci-tidb/mybatis-test	✅ all 1 tests passed	4 min 43 sec	Fixed
idc-jenkins-ci-tidb/common-test	🟢 all 11 tests passed	10 min	Existing passed
idc-jenkins-ci-tidb/tics-test	🟢 all 1 tests passed	6 min 50 sec	Existing passed
idc-jenkins-ci-tidb/integration-ddl-test	🟢 all 6 tests passed	5 min 37 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	3 min 41 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed