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Dashboard attribute query latency has increased in recent versions.
Is this related to the to the <https://signoz.io/guides/metrics-migration/|Metrics Migration>  ?

For example the following attribute query:
```SELECT DISTINCT(JSONExtractString(labels, 'k8s.namespace.name'))
FROM signoz_metrics.time_series_v4_1day
WHERE notEmpty(JSONExtractString(labels, 'k8s.namespace.name'))```
takes the following to complete and occasionally times out:

```index.ts:43 [API Warning] Request to /variables/query took 39274ms
index.ts:43 [API Warning] Request to /variables/query took 43196ms```