Virtual Memory problems on Informix start up

Hi All I'm hoping someone can explain why this is happening. We have Informix 9.3 installed on a Sun box which has 16Gb RAM and 8 1.2GHz CPUs. We have noticed that informix is starting up strangely - before informix starts, there is about 13Gb of real memory with 225M of swap space in use. After informix starts up, about 7Gb of real memory is left (expected), but swap space in use goes up to 7Gb, which is not expected. Before 'oninit -v' load averages: 2.11, 3.68, 3.61 19:08:12 87 processes: 85 sleeping, 2 on cpu CPU states: 85.5% idle, 12.2% user, 2.3% kernel, 0.0% iowait, 0.0% swap Memory: 16G real, 13G free, 151M swap in use, 25G swap free After 'oninit -v' load averages: 1.79, 3.28, 3.47 19:09:15 116 processes: 113 sleeping, 3 on cpu CPU states: 65.8% idle, 18.2% user, 15.9% kernel, 0.1% iowait, 0.0% swap Memory: 16G real, 7345M free, 6632M swap in use, 19G swap free Why is this happening? Is there a misconfiguration in the kernel parameter settings or in the onconfig? Why should it use swap space first? Any advice greatly appreciated, as I am totally flummoxed! tia paul

asfafa wrote: > Hi All > > I'm hoping someone can explain why this is happening. > > We have Informix 9.3 installed on a Sun box which has 16Gb RAM and 8 > 1.2GHz CPUs. > > We have noticed that informix is starting up strangely - before > informix starts, there is about 13Gb of real memory with 225M of swap > space in use. After informix starts up, about 7Gb of real memory is > left (expected), but swap space in use goes up to 7Gb, which is not > expected. > > Before 'oninit -v' > load averages: 2.11, 3.68, 3.61 > 19:08:12 > 87 processes: 85 sleeping, 2 on cpu > CPU states: 85.5% idle, 12.2% user, 2.3% kernel, 0.0% iowait, 0.0% > swap > Memory: 16G real, 13G free, 151M swap in use, 25G swap free > > After 'oninit -v' > load averages: 1.79, 3.28, 3.47 > 19:09:15 > 116 processes: 113 sleeping, 3 on cpu > CPU states: 65.8% idle, 18.2% user, 15.9% kernel, 0.1% iowait, 0.0% > swap > Memory: 16G real, 7345M free, 6632M swap in use, 19G swap free > > > Why is this happening? Is there a misconfiguration in the kernel > parameter settings or in the onconfig? Why should it use swap space > first? > > Any advice greatly appreciated, as I am totally flummoxed! > > > tia > > paul > What is your $ONCONFIG? i.e. how big is your instance configured and what is RESIDENT set to??? TBP