Chris Cameron <chris(at)upnix(dot)com> writes:
> [root(at)ilearner 16976]# du -hs * | grep M
> 26M 1456419
> 6.1M 1456422
> 35M 639251
> 30M 639253
^^^^^^
The file names correspond to values in the relfilenode column of
pg_class. Now look in pg_class to discover exactly which tables or
indexes these large files are.
regards, tom lane