Kevin Kempter wrote:
Sorry, I meant to send this to the list:
We have a handful of tables that are quite large and take several hours to
vacuum. We're managing these large tables by using cron via a schedule that
accounts for system load. I want to pull the list of all tables and exclude
these large tables from the list, then run the vacuum on the remaining tables
once a week to avoid transaction ID wraparound failures.
If I were you, I would use autovacuum for all tables *except* the high
velocity tables. That will take care of the wrap concerns and will also
allow you to be aggressive via cron on the tables that autovacuum isn't
good enough for.
Oh... and get up to 8.1.10
Joshua D. Drake
/Kevin
Kevin Kempter <kevin@xxxxxxxxxxxxxxxxxxx> writes:
I'm working with a client with several highly active 8.1.4 servers. I
want to run a weekly cron that will vacuum ALL db tables except those
with entries in pg_autovacuum (where we've setup manual/cron vacuums) in
order to eliminate transaction ID wraparound failure warnings (which
comes up fairly often).
My question is:
will a select from pg_tables for each database in the cluster provide me
with a full table listing for the purposes of ensuring that all tables in
the db have been vacuumed or are there others I'll need to account for as
well ?
Why are you insisting on inventing your own wheel for this, when
"vacuum" without a parameter does that just fine?
regards, tom lane
On Monday 19 November 2007 16:29:15 you wrote:
Kevin Kempter <kevin@xxxxxxxxxxxxxxxxxxx> writes:
I'm working with a client with several highly active 8.1.4 servers. I
want to run a weekly cron that will vacuum ALL db tables except those
with entries in pg_autovacuum (where we've setup manual/cron vacuums) in
order to eliminate transaction ID wraparound failure warnings (which
comes up fairly often).
My question is:
will a select from pg_tables for each database in the cluster provide me
with a full table listing for the purposes of ensuring that all tables in
the db have been vacuumed or are there others I'll need to account for as
well ?
Why are you insisting on inventing your own wheel for this, when
"vacuum" without a parameter does that just fine?
regards, tom lane
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