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variable: fix the TiDBDistSQLScanConcurrency comment (#24451)

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Ryan Leung
2021-05-11 19:21:40 +08:00
committed by GitHub
parent 7611952a09
commit c5e20dd1a2
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sessionctx/variable/tidb_vars.go
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@ -216,7 +216,6 @@ const (
// A distsql scan task can be a table scan or a index scan, which may be distributed to many TiKV nodes.
// Higher concurrency may reduce latency, but with the cost of higher memory usage and system performance impact.
// If the query has a LIMIT clause, high concurrency makes the system do much more work than needed.
// tidb_distsql_scan_concurrency is deprecated, use tidb_executor_concurrency instead.
TiDBDistSQLScanConcurrency = "tidb_distsql_scan_concurrency"
// tidb_opt_insubquery_to_join_and_agg is used to enable/disable the optimizer rule of rewriting IN subquery.