On 05/10/10 20:39, Josh Berkus wrote:
On 5/9/10 1:45 AM, Dimitri wrote:
Josh,
it'll be great if you explain how did you change the records size to
128K? - as this size is assigned on the file creation and cannot be
changed later - I suppose that you made a backup of your data and then
process a full restore.. is it so?
You can change the recordsize of the zpool dynamically, then simply copy
the data directory (with PostgreSQL shut down) to a new directory on
that zpool. This assumes that you have enough space on the zpool, of
course.
Other things could have influenced your result - 260 MB/s vs 300 MB/s is
close enough to be influenced by data position on (some of) the drives.
(I'm not saying anything about the original question.)
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