![]() The solution is to adjust the COPY command parameters to add “COMPUPDATE OFF” and “STATUPDATE OFF”, which will disable these features during upsert operations. ![]() For example, they may saturate the number of slots in a WLM queue, thus causing all other queries to have wait times. In the below example, a single COPY command generates 18 “analyze compression” commands and a single “copy analyze” command:Įxtra queries can create performance issues for other queries running on Amazon Redshift. Even if the COPY command determines that a better encoding style exists, it’s impossible to modify the table’s encoding without a deep copy operation. In Redshift, the data encoding of an existing table cannot be changed.
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