Re: [GENERAL] Large database

> > > i filed a bug report at one time noting that:
> > > "ALTER TABLE tbname RENAME TO tbname_new;"
> > > was not renaming all of the extents.
> > > 
> > > do you know if this has been fixed?
> > 
> > Yes, in 6.5.*.
> 
> cool.
> 
> if i'm annoying you, tell me to go away.
> 
> do you know why vacuum can consume an enormous amount of core when cleaning
> a large table?
> 
> i've actually had to add a gig of swap to our server so that vacuum can
> actually finish on some of our tables.
> 
> sometimes the vacuum won't even do that, and i need to:
> 
> pg_dump -t tb -s db > tb.dmp
> psql -c "copy tb to stdout using delimiters ':';" db | gzip > tb.dat.gz
> psql -c "drop table tb;" db
> psql -e db < tb.dmp
> zcat tb.dat.gz | psql -c "copy tb from stdin using delimiters ':';" db
> 
> very painful (taking several hours).

Can someone comment on the high memory usage of vacuum?


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