Robert Haas 0811f766fd pg_surgery: Try to stabilize regression tests. ... According to buildfarm member sungazer, the behavior of VACUUM can be unstable in these tests even if we prevent autovacuum from running on the tables in question, apparently because even a manual vacuum can behave differently depending on whether anything else is running that holds back the global xmin. So use a temporary table instead, which as of commit a7212be8b9 enables vacuuming using a more aggressive cutoff. This approach can't be used for the regression test that involves a materialized view, but that test doesn't run vacuum, so it shouldn't be prone to this particular failure mode. Analysis by Tom Lane. Patch by Ashutosh Sharma and me. Discussion: http://postgr.es/m/665524.1599948007@sss.pgh.pa.us		2020-09-18 13:26:48 -04:00
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