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Possible causes for "tuple concurrently updated" error - Mailing list pgsql-general

From Jacob Scott
Subject Possible causes for "tuple concurrently updated" error
Date
Msg-id CA+yM-qb=dNwCS147n7wbh8Uq8Y-uqoNewfeJ+4TOgWwdZVAJFg@mail.gmail.com
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Responses Re: Possible causes for "tuple concurrently updated" error
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Hi,

I'm seeing a "tuple concurrently updated" error thrown while executing UPDATE statements. I've attempted to diligently review previous threads on this error (e.g., https://www.google.com/webhp?ie=UTF-8#q=tuple+concurrently+updated+update+site:postgresql.org) but am confused about what classes of queries can conflict to cause this error.
  • It seems clear from previous threads that 
    • two concurrent ANALYZE queries on the same table can cause this this error.
    • some access control/DDL statements (e.g. GRANT) run concurrently can cause this error.
  • Can a "VACUUM ANALYZE $TABLE" (e.g., from autovacuum) concurrent with a "UPDATE $TABLE" cause this error?
  • Can two concurrent "UPDATE $TABLE" queries which touch completely disjoint sets of rows (e.g. where clause on primary key with disjoint filters) cause  this error?
Thanks,

Jacob


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