Good Morning everybody,
we're using SAP Release 4.6C on Basis 4.6D for our R/3, and 620 for our BW Systems together with IBM DB2 V8.1.7b / V8.2 under AIX 5.2 ML4 and ML5.
Problem is that quite often more than 40% of our paging space are consumed by SAP (you can see that via topas).
So far so good. Fact is there are some jobs on R/3 that are using a lot of memory (more than we have, so that the system has to start paging). But after those jobs are finished and the system becomes idle (almost no CPU load, almost no disk activity, no jobs running) the paging space remains at over 40% use and it takes a lot of time for at least a little bit of it to become free again. Although all the resources are free and the system should have more than enough opportunity to free paging space.
Only way to clean it up completely is to perform a stopdb, which than takes quite some time to complete because it has to write all the data in the paging space back to the disks.
Is there any way to speed up the "normal" process of cleaning up paging space under running (!) system as soon as there are enough free resources under AIX without having to do a stopdb ? You can understand, that we'd like to keep the system up and running
Thanks in advance !
Regards,
Thomas Schmitt
we're using SAP Release 4.6C on Basis 4.6D for our R/3, and 620 for our BW Systems together with IBM DB2 V8.1.7b / V8.2 under AIX 5.2 ML4 and ML5.
Problem is that quite often more than 40% of our paging space are consumed by SAP (you can see that via topas).
So far so good. Fact is there are some jobs on R/3 that are using a lot of memory (more than we have, so that the system has to start paging). But after those jobs are finished and the system becomes idle (almost no CPU load, almost no disk activity, no jobs running) the paging space remains at over 40% use and it takes a lot of time for at least a little bit of it to become free again. Although all the resources are free and the system should have more than enough opportunity to free paging space.
Only way to clean it up completely is to perform a stopdb, which than takes quite some time to complete because it has to write all the data in the paging space back to the disks.
Is there any way to speed up the "normal" process of cleaning up paging space under running (!) system as soon as there are enough free resources under AIX without having to do a stopdb ? You can understand, that we'd like to keep the system up and running
Thanks in advance !
Regards,
Thomas Schmitt