If I'm doing a reasonably sized COPY e.g. a few hundred megabytes, would
WAL segment size and number be relevant? If so any pointers on how I should
tweak stuff?
How about for speeding up many inserts?
At 12:13 AM 7/22/2003 -0400, Tom Lane wrote:
>AFAIR you cannot force the system to have only one WAL segment; it
>*will* make another one when it has to.
>
>Once it has established a checkpoint within the current WAL segment,
>it is able to delete the previous segment, and will do so if you've
>set the WAL parameters that small. I don't really recommend doing
>so however. Creating and deleting WAL segments is expensive, and not
>very productive compared to recycling them. The out-of-the-box
>settings allow the system to recycle three or so WAL segments.
>Unless you're truly desperate for disk space you should not reduce
>the default WAL settings.
>
> regards, tom lane
>
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