On Wed, Apr 19, 2017 at 12:48 AM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Alvaro Herrera <alvhe...@2ndquadrant.com> writes: >> Tom Lane wrote: >>> FWIW, I'm a bit suspicious of relocating the temp stats directory as >>> being a reliable fix for this. > >> It's an SD card (the kind typically used in cameras and phones), not SSD. >> Saying it's slow is an understatement. It's *excruciatingly* slow. > > Oh, I misread it ... but still, the modern definition of "excruciatingly > slow" doesn't seem all that far off what 90s-era hard drives could do. > It is clear from googling though that there's an enormous performance > range in SD cards' random write performance, eg wikipedia's entry has > a link to > > http://goughlui.com/2014/01/16/testing-sd-card-performance-round-up/ > > Seems like it's hard to judge this without knowing exactly which > SD card Michael has got in that thing.
Professional micro SD HC 8GB, with class 10, which is utterly slow in the things I have tested up to now and of course I cannot find its read/write properties. I had a SanDisk class 10 in it that died some months ago, and that was way faster. RIP. -- Michael -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
