Re: long checkpoints on informix

On 18 jul, 16:48, "Art S. Kagel" <art.ka...@gmail.com> wrote: > But more seriously, are your chunks all RAW disk? Using COOKED files > will seriously degrade server performance by as much as 40% and at > least 25% over RAW disk unless you are using DIRECT IO which is first > supported in IDS version 10.10xc4 IB. (Even with DIRECT IO there's a > performance penalty of about 5%, but that's at least livable if the > convenience of COOKED files is desirable.) > > Art S. Kagel mm.....im reading about RAID5 and is a big problem im working to find a solution to this, also all my chunks are RAW disk btw im instresting to learn more about "DIRECT IO" but i dont found specify information about it. which type of ARRAY your recommend for a OLPT database system