dump historical stats failed because of too large entry.

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

if you have a large cluster tidb with a huge number of partition table.

2. What did you expect to see? (Required)

save historical stats successfully

3. What did you see instead (Required)

{"log":"[domain.go:2144] [\"dump historical stats failed\"] [error=\"record table db0ios.table28ios's historical stats failed, err:[kv:8025]entry too large, the max entry size is 6291456, the size of data is 6291516\"] [tableID=254127]","container":"tidb","pod":"tc-tidb-2","namespace":"partition-analyze-test-tps-2730857-1-178","level":"WARN"}


2023-10-15 16:02:36	
{"log":"[session.go:2283] [\"run statement failed\"] [schemaVersion=309] [error=\"[kv:8025]entry too large, the max entry size is 6291456, the size of data is 6291516\"] [session=\"{\\n  \\\"currDBName\\\": \\\"\\\",\\n  \\\"id\\\": 0,\\n  \\\"status\\\": 3,\\n  \\\"strictMode\\\": true,\\n  \\\"txn\\\": \\\"444951941130485765\\\",\\n  \\\"user\\\": null\\n}\"]","container":"tidb","pod":"tc-tidb-2","namespace":"partition-analyze-test-tps-2730857-1-178","level":"WARN"}

4. What is your TiDB version? (Required)