Sporadic refresh happening even though refresh_interval is set to -1

Hi everyone,

Today I noticed that for an index I'm currently reindexing (as source, all writes disabled only search taking place) there are some refreshes happening, but the refresh_interval is already set to -1.

I see every time this happens the search QoS decreases dramatically, as soon as refresh finishes, it returns back to normal (450~ req/sec)

Is there any other setting that needs to be disabled in the index or cluster level so this kind of unexpected refresh cycles don't happen ?

With refresh interval set to -1 I believe refresh happens purely based on size when the internal buffers fill up.

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