On Fri, May 17, 2013 at 4:26 AM, Rob Emery re-pg...@codeweavers.net wrote:
Hi All,
We've got 3 quite large tables that due to an unexpected surge in
usage (!) have grown to about 10GB each, with 72, 32 and 31 million
rows in. I've been tasked with cleaning out about half of them, the
Rob,
I'm going to make half of the list cringe at this suggestion though I have
used it successfully.
If you can guarantee the table will not be vacuumed during this cleanup or
rows you want deleted updated, I would suggest using the ctid column to
facilitate the delete. Using the simple
On 17.5.2013 03:34, Mark Kirkwood wrote:
On 17/05/13 12:06, Tomas Vondra wrote:
Hi,
On 16.5.2013 16:46, Cuong Hoang wrote:
Pro for the master server. I'm aware of write cache issue on SSDs in
case of power loss. However, our hosting provider doesn't offer any
other choices of SSD drives
Do you really need a running standby for fast failover? What about doing
plain WAL archiging? I'd definitely consider that, because even if you
setup a SAS-based replica, you can't use it for production as it does no
handle the load.
I think you could setup WAL archiving and in case of crash just
Thanks for suggestion Tomas. We're about to set up WAL backup to Amazon S3.
I think this should cover all of our bases. At least for the moment,
SAS-based standby seems to keep up with the master because that's its sole
purpose. We're not sending queries to the hot standby. We also consider
On 5/13/13 6:36 PM, Mike McCann wrote:
stoqs_march2013_s=# explain analyze select * from
stoqs_measuredparameter order by datavalue;
QUERY PLAN
On 5/17/13 7:26 AM, Rob Emery wrote:
I can keep decreasing the size of
the window I'm deleting but I feel I must be doing something either
fundamentally wrong or over-complicating this enormously.
I've had jobs like this where we ended up making the batch size cover
only 4 hours at a time.
On 5/16/13 8:06 PM, Tomas Vondra wrote:
Have you considered using a UPS? That would make the SSDs about as
reliable as SATA/SAS drives - the UPS may fail, but so may a BBU unit on
the SAS controller.
That's not true at all. Any decent RAID controller will have an option
to stop write-back
On 5/16/13 7:52 PM, Cuong Hoang wrote:
The standby host will be disk-based so it
will be less vulnerable to power loss.
If it can keep up with replay from the faster master, that sounds like a
decent backup. Make sure you setup all write caches very carefully on
that system, because it's
On Sun, May 19, 2013 at 8:44 PM, Greg Smith g...@2ndquadrant.com wrote:
On 5/13/13 6:36 PM, Mike McCann wrote:
stoqs_march2013_s=# explain analyze select * from
stoqs_measuredparameter order by datavalue;
QUERY PLAN
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