Multiple node cluster worse than single node

Elastic Stack Elasticsearch
1

I had 43G data to do the match query. When I set up a single node (no dedicated role), it works very well. After I set up a cluster, 3 master node, 2 data node and 1 client node. The time took for each query seems like to be double than it took in the single node scenario. Could somebody give me a hint about this situation? Really appreciated!

Thanks!

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