Dear all,
I'm presently trying to import the full wikipedia dump for one of our
research users. Unsurprisingly it's a massive import file (2.7T)
Most of the data is importing into a single MyISAM table which has an id
field and a blob field. There are no constraints / indexes on this
table. We're using an XFS filesystem.
The import starts of quickly but gets increasingly slower as it
progresses, starting off at about 60 G per hour but now the MyISAM table
is ~1TB it's slowed to a load of about 5G per hour. At this rate the
import will not finish for a considerable time, if at all.
Can anyone suggest to me why this is happening and if there's a way to
improve performance. If there's a more suitable list to discuss this,
please let me know.
Regards
Simon
--
Dr Simon Collins
Data Grid Consultant
National Grid Service
University of Manchester
Research Computing Services
Kilburn Building
Oxford Road
Manchester
M13 9PL
Tel 0161 275 0604
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