I have looked over your latest statistics and on some previous ones.
I would like to see some statistics before you moved to Parallel Services
I would like to know, whether you still consider your response times unsatisfactory. The latest statistics look okay.
Setting LRDP to zero will increase the number of blocks written to the cache space and could create a small CPU overhead.
The default LRDP size is large and can usually be reduced, but should be kept larger than the high watermark.
Your nuclei have a low update ratio. I suggest that you keep ASYTVS=Yes, but set FMXIO=1.
There is no need to reduce LFIOP (25MB) currently.
Under ASM LFIOP should be kept several times smaller than the clucachesize, which is the case here.
Your bufferflushes work as intended and there seems no problem with them.
Directory reclaims and Space reclaims should not be confused
Directory reclaims are a cause for concern, because valid blocks are invalidated and finding a directory to overwrite consumes CPU.
On the other hand space reclaim in the cache is normal and unavoidable.
You can not really tune it. Once the cache is full blocks get overwritten on a demand basis and the cache will get full sooner or later.
In fact your cache space (1000MB) is very large and could be reduced.
But you always have to ensure that you have a enough directory elements.
This number is calculated
From the number of data elements created out of your clucachesize
(1000 MB) and data element size (in your case 1K). This gives you
1024 000 data elements.
The number of directory elements is now computed from
which means you get as many directory elements as data elements.
If you reduce your cache you would have to change this ratio so that you still have enough directory elements.