Merge pull request #154902 from yuzefovich/blathers/backport-release-25.3-154883

release-25.3: roachtest: increase closed TS lag in copyfrom roachtest

Author: yuzefovich

pkg/cmd/roachtest/tests/copyfrom.go

@@ -148,8 +148,12 @@ func runCopyFromCRDB(ctx context.Context, t test.Test, c cluster.Cluster, sf int
 	// Enable the verbose logging on relevant files to have better understanding
 	// in case the test fails.
 	startOpts.RoachprodOpts.ExtraArgs = append(startOpts.RoachprodOpts.ExtraArgs, "--vmodule=copy_from=2,insert=2")
-	// roachtest frequently runs on overloaded instances and can timeout as a result
-	clusterSettings := install.MakeClusterSettings(install.ClusterSettingsOption{"kv.closed_timestamp.target_duration": "60s"})
+	// The roachtest frequently runs on overloaded instances and can timeout as
+	// a result. We've seen cases where the atomic COPY takes about 2 minutes to
+	// complete, so we set the closed TS to 5 minutes (to give enough safety
+	// gap, otherwise the closed TS system might continuously push the COPY txn
+	// not allowing it ever to complete).
+	clusterSettings := install.MakeClusterSettings(install.ClusterSettingsOption{"kv.closed_timestamp.target_duration": "300s"})
 	c.Start(ctx, t.L(), startOpts, clusterSettings, c.All())
 	initTest(ctx, t, c, sf)
 	db, err := c.ConnE(ctx, t.L(), 1)