Re: Index Add Failures

Quanah Gibson-Mount wrote: > --On Tuesday, November 13, 2012 4:25 PM -0800 Howard Chu <hyc(a)symas.com&gt; > wrote: > >>> I found that OSX acts different -- It actually allocates the entire >>> size of the database on disk, regardless of how much is used. That >>> may be common to all the BSDs. >> >> Sounds like whatever filesystem is default on BSDish systems doesn't >> support sparse files. >> >> Anyway, you can use mdb_stat to see what's in the MDB environment. > > Oh, one additional note about the BSDs... I didn't see that behavior > until I enabled writemap. Disabling writemap reverted it to the same > behavior as linux, but then of course the advantage of writemap is lost. > :P That's to be expected. When writemap is enabled, we ask the OS to preallocate the entire map space. Otherwise, writing to a new page would get a SIGBUS.