On 02/27/14 10:43, Scott Marlowe wrote:
On Wed, Feb 26, 2014 at 5:40 PM, Steve Crawford
<scrawford@xxxxxxxxxxxxxxxxxxxx> wrote:
On 02/26/2014 08:56 AM, Alvaro Herrera wrote:
...
No matter how heavily updated, regular activity should not cause
autovacuum kills. Only heavier operations would do that (say ALTER
TABLE, etc).
"Considered harmful" got my attention. What, if any, known harm is caused?
We have many errors of this type but in our case most are due to batch
processes that have a vacuum embedded at appropriate points in the string of
commands in order to avoid excessive bloat and to ensure the tables are
analyzed for the following steps. Occasionally the autovacuum triggers
before the manual but gets canceled.
Any harm?
We have some rather large tables that have never been autovacuumed. At
first I was thinking it was due to pgsql cancelling them due to load
etc. But if it's slony getting in the way then cancelling them is
still harmful, it's just not postgres' fault.
Slony (even the very old 1.2) does not cancel anything explicitly.
Jan
--
Jan Wieck
Senior Software Engineer
http://slony.info
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