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Hi All, We are currently in the process of testing Solaris 10 with ZFS and Oracle and are running it on a T2000. When checking performance statistics on the T2000, we notice that only one thread of the CPU appears to be doing any of the processing. Leaving all other threads seemingly idle. Are there any tuning parameters that need to be set or changed when running Oracle on T2000 using

I wrote a simple tool to print out the ARC statistics exported via kstat. Details at http://blogs.sun.com/realneel/entry/zfs_arc_statistics -neel -- --- Neelakanth Nadgir PAE Performance And Availability Eng

if you have N processes reading the same file sequentially (where file size is much greater than physical memory) from the same starting position, should I expect that all N processes finish in the same time as if it were a single process? In other words, if you have one process that reads blocks from a file, is it "free" (meaning no additional total I/O cost) to have another process

...intermediate data storage using a stack, I shall use the information to prepare a ''dot'' file which I plan to feed to ''dotty'' (Graphviz) to give me the call graph. Is this a good approach? Has anybody tried something similar? This blog post http://blogs.sun.com/realneel/entry/visualizing_callstacks_via_dtrace_and by Neelkanth comes closest, but the motives are dissimilar. Initially I tried to tweak it for my purpose. I thought, a ''regex'' based approach would be generic. (I am not sure). I would appreciate any feedback and comments. Thanks, Ami...

I appear to be seeing the performance of a local ZFS file system degrading over a short period of time. My system configuration: 32 bit Athlon 1800+ CPU 1 Gbyte of RAM Solaris 10 U6 SunOS filer 5.10 Generic_137138-09 i86pc i386 i86pc 2x250 GByte Western Digital WD2500JB IDE hard drives 1 zfs pool (striped with the two drives, 449 GBytes total) 1 hard drive has

Greetings, all. Does anyone have a good whitepaper or three on how ZFS uses memory and swap? I did some Googling, but found nothing that was useful. The reason I ask is that we have a small issue with some of our DBA''s. We have a server with 16GB of memory, and they are looking at moving over databases to it from a smaller system. The catch is that they are moving to 10g. Oracle

We are using MySQL, and love the idea of using zfs for this. We are used to using Direct I/O to bypass file system caching (let the DB do this). Does this exist for zfs? This message posted from opensolaris.org