tidb版本：5.2
部署方式：k8s
问题：
使用tidb-lightning导入数据，报错：
TiKV stores (4, 5, 1) contains more than 1000 empty regions respectively, which will greatly affect the import speed and success rate
查询INFORMATION_SCHEMA.TIKV_REGION_STATUS确实有很多 empty regions
根据官方建议的，默认是开启region merge：
./pd-ctl config show
{
“replication”: {
“enable-placement-rules”: “true”,
“isolation-level”: “”,
“location-labels”: “”,
“max-replicas”: 3,
“strictly-match-label”: “false”
},
“schedule”: {
“enable-cross-table-merge”: “true”,
“enable-joint-consensus”: “true”,
“high-space-ratio”: 0.7,
“hot-region-cache-hits-threshold”: 3,
“hot-region-schedule-limit”: 4,
“leader-schedule-limit”: 4,
“leader-schedule-policy”: “count”,
“low-space-ratio”: 0.8,
“max-merge-region-keys”: 200000,
“max-merge-region-size”: 20,
“max-pending-peer-count”: 16,
“max-snapshot-count”: 3,
“max-store-down-time”: “30m0s”,
“merge-schedule-limit”: 8,
“patrol-region-interval”: “100ms”,
“region-schedule-limit”: 2048,
“region-score-formula-version”: “v2”,
“replica-schedule-limit”: 64,
“split-merge-interval”: “1h0m0s”,
“tolerant-size-ratio”: 0
}
./pd-ctl config show all | grep enable
“enable-grpc-gateway”: true,
“enable-local-tso”: false,
“enable-one-way-merge”: “true”,
“enable-cross-table-merge”: “true”,
“enable-remove-down-replica”: “true”,
“enable-replace-offline-replica”: “true”,
“enable-make-up-replica”: “true”,
“enable-remove-extra-replica”: “true”,
“enable-location-replacement”: “true”,
“enable-debug-metrics”: “false”,
“enable-joint-consensus”: “true”,
“enable-placement-rules”: “true”,
“enable-telemetry”: true,
“enable-experimental”: false
TIDB集群目前只是用作一个测试使用，基本没连接和数据
如何解决这个问题呢？