Downgrading from Enterprise to Growth license

Hi, Does anyone have any experience downgrading their Informix license from Enterprise to Growth? The cost savings for us are significant, even considering the initial purchase of the Growth license. We've looked at the differences in the licenses, and believe we can live with all the limitations of Growth, except two that we're unsure of: 1. No Direct I/O for Cooked files 2. No Private Memory Cache for CPU VPs We're prepared to convert to Raw files, and I'm told performance is comparable with Cooked files using Direct I/O. Is that correct? And are there any concerns with Raw files one should be aware of? That leaves point 2, Private Memory Cache. I believe we can turn this feature off and see what the effect is in our current enterprise environment, but before we take the plunge, as anyone done this? If so, what were the effects on performance? Thanks.

See below: Art Art S. Kagel Advanced DataTools (www.advancedatatools.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Advanced DataTools, the IIUG, nor any other organization with which I am associated either explicitly, implicitly, or by inference. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves. On Tue, Sep 14, 2010 at 6:09 PM, ANTHONY PERSIC <tony.persic@amcor.com.au>wrote: > Hi, > > Does anyone have any experience downgrading their Informix license from > Enterprise to Growth? The cost savings for us are significant, even > considering the initial purchase of the Growth license. > > We've looked at the differences in the licenses, and believe we can live > with > all the limitations of Growth, except two that we're unsure of: > > 1. No Direct I/O for Cooked files > 2. No Private Memory Cache for CPU VPs > > We're prepared to convert to Raw files, and I'm told performance is > comparable > with Cooked files using Direct I/O. Is that correct? And are there any > concerns with Raw files one should be aware of? > No concerns. RAW files are actually preferred to COOKED even with DIRECT_IO. Typically RAW is 4-5% faster than COOKED with DIRECT_IO and about 10-15% faster than COOKED devices and 20-25% faster than COOKED filesystem files without DIRECT_IO. > > That leaves point 2, Private Memory Cache. I believe we can turn this > feature > off and see what the effect is in our current enterprise environment, but > before we take the plunge, as anyone done this? If so, what were the > effects > on performance? > This is a tough one. Some systems gained much from the PMC when they upgraded to 11.50, others not much. It is a hard one to quantify. > > Thanks. > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > --0016e650966eee4dd8049040bf2f