Chunk Auto-expanding

Hi , I'm studying about the auto-expanding feature. ifx.1170 FC6 Appreciate any help/explanation . I trying understand how Informix should behave in certain situation and how I see/do the configuration. The situation what is my desire to work : * No storage pool configuration. * Use only the chunk expanding feature , because on my test environment we are using cooked file. * I want the chunk expand 500 MB only when they become full. The onconfig values of my test environment are : SP_AUTOEXPAND 1 SP_THRESHOLD 0 SP_WAITTIME 30 I enable the auto-expand for each chunk with the comand task("modify chunks extendable on "...) then I change one dbspace configuration with the command task('modify space sp_size', 9, 0 500000) to configure the expand the chunk with minimal of 500 MB with onstat -d , the flag E appear for each chunk and all dbspaces show the flag A . With this I understand the instance is ready to autoexpand the chunk when it become full , this is correct ? Question : There is some way to enable autoexpand for chunks by default when create them with onspaces? Question : I was created the dbspaces with onspaces and after that not apply any other configuration. I suppose the Auto-expand (flag A) is the default value , what parameter define this default? SP_AUTOEXPAND ? Question : I read in some place (blog or manual) when the dbspace flag have A , means they have create/extend size configured with some value diff of zero. I understand this means the value was set with "modify space sp_size" command. So, where/who set this values for the other chunks? since I configure manually only one. Looking the sysdbspaces I found this : dbsnum create_size extend_size 1 10.00000000000 10000.00000000 2 10.00000000000 10000.00000000 3 10.00000000000 10000.00000000 4 10.00000000000 0.00 5 10.00000000000 10000.00000000 6 10.00000000000 10000.00000000 7 10.00000000000 10000.00000000 8 10.00000000000 10000.00000000 9 0.00 500000.0000000 10 10.00000000000 100000.0000000 I not able to identify the origin of 10 and 10000 configured for all dbspaces... Where I set this default values for them? (and new dbspaces already assume the correct default). Unfortunately the manual isn't clear enough about the relation of all parameters, default values , admin commands and task schedulers... Regards Cesar --f46d0438eddb84c5ef04d6e25221