First off: "reds" aren't nessesarily a huge problem. It may INDICATE a problem (elsewhere) in the system, but it's OK for your system to swap a little. I'm assuming from the large memory allocation, however, that you're probably doing some datamigration or similar. If this is the case, then You have a couple of entires worth changing in RZ10/RZ11:
abap/buffersize 900000 Increase this by at least 25% It's unlikely to give a performance gain, but at least you'll get rid of the programbuffer swaps.
rsdb/obj/buffersize 80000 There's some freesapce, but it may not be enough. Consider increasing this by 5-10% if you have problems with the buffering
rsdb/obj/max_objects 30000 Seems low. But at the same time, you only have 2,5KB pr object on average. So increasing this might also cause a strain on the buffersize during high loads. However, I'd suggest increasing it by at least 5000 objects initially.
rsdb/ntab/ftabsize 74680 Not that much of a problem, but you could try to add in another 10% or so if you want to loose it.
rsdb/ntab/entrycount 15000 Very low count, normally, I'd set it to 50-100.000 It doesn't really matter much as you'll usually never get a very high NTAB buffer ratio on a productive or development system. As this is a QA system, you may be able to hit the 90% mark depending on the usage.
However, IF you're doing a large datamigration, I'd suggest you keep track of the DB statistics aswell, as this is likely to cause way more problems than the buffers.
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by: mass2612Posted on 2008-12-09 at 16:16:14ID: 23135223
Hi,
I've had a look at your screen shot. What's your RAM in the system like? Do you have plenty of available RAM in ST06 i.e. Physical memory free?
If so then you can see in ST02 that you Export/Import buffer entries appear to be too small as there is nothing showing as free in those fields. I would suggest that you might want to increase the buffer size or the maximum number of allowed entries by 10%-50%. You should see the hit ratio for your buffers at 98% or more and the swaps should be reserved to the program buffer in a production system.
To identify the parameters in question you can double click the Export/Import row in ST02 and select the current parameter settings.
Before increasing the buffer sizes make sure the system has sufficient free memory in reserve otherwise you may create a memory bottleneck.