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From Stepan Migunov <>
Subject Performance degradation on query analysis
Date Tue, 17 Sep 2019 07:58:37 GMT
We have an issue with our production environment - from time to time we notice a significant
performance degradation for some queries. The strange thing is that the EXPLAIN operator for
these queries takes the same time as queries execution (5 minutes or more). So, I guess, the
issue is related to query's analysis but not data extraction. Is it possible that issue is
related to SYSTEM.STATS access problem? Any other ideas?

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