Update system-variable tidb_schema_cache_size#21510
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Update variable tidb_schema_cache_size
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Update variable tidb_schema_cache_size
First-time contributors' checklist
What is changed, added or deleted? (Required)
Update system-variable tidb_schema_cache_size
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By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.
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