Jeff Davis wrote:
Is it overestimating the cost of using indexes or underestimating the
cost of a seq scan, or both? Maybe explain with the 0.1 setting will
help?
If enable_seqscan is off, and cost is still set to 1, it could
be that it's quite simply forcibly underestimating the co
Jim C. Nasby wrote:
That said, it's the transactions against disk that typically matter. On
FreeBSD, you can get an impression of this using 'systat -vmstat', and
watch the KB/t column for your drives.
On a related note, you know of any way to determine the breakdown
between read activit
Jim Nasby wrote:
While working on determining a good stripe size for a database, I
realized it would be handy to know what the average request size is.
Getting this info is a simple matter of joining pg_stat_all_tables and
pg_statio_all_tables and doing some math, but there's one issue I've
fo
