Issues with Upgrading to 6.5

Note:
This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: 6.5升级问题

| username: mono

【TiDB Usage Environment】Production Environment
【TiDB Version】6.5.7
【Encountered Problem: Phenomenon and Impact】
After upgrading from 6.5.5 to 6.5.7 using tiup, sometimes a warning is received when querying.

±------------------------------+
| IFNULL(sum(diamond_amount),0) |
±------------------------------+
| 34049505 |
±------------------------------+
1 row in set, 1 warning (0.82 sec)

mysql> show warnings;
±--------±-----±------------------------+
| Level | Code | Message |
±--------±-----±------------------------+
| Warning | 1105 | sync load stats timeout |
±--------±-----±------------------------+

| username: zhanggame1 | Original post link

After the upgrade, let’s analyze the idle schedules once.

| username: mono | Original post link

The cluster was stopped for an upgrade.

| username: xfworld | Original post link

Refer to this

| username: mono | Original post link

It’s possible that I didn’t notice it in version 6.5.5, and there was also this warning message. Compared it with version 5.4. This variable is indeed enabled in the new version. Thank you!

| username: dba远航 | Original post link

This variable is enabled in the new version.

| username: system | Original post link

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