Messages in this thread | | | Date | Fri, 20 Sep 2002 15:07:34 -0700 | From | "Martin J. Bligh" <> | Subject | Re: TPC-C benchmark used standard RH kernel |
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>> This isn't as recent as I would like, but it will give you an idea. >> Top 75 from readprofile. This run was not using bigpages though. >> Andy > >> 00000000 total 7872 0.0066 >> c0105400 default_idle 1367 21.3594 >> c012ea20 find_vma_prev 462 2.2212 >> c0142840 create_bounce 378 1.1250 >> c0142540 bounce_end_io_read 332 0.9881 >> c0197740 __make_request 256 0.1290 >> c012af20 zap_page_range 231 0.1739 >> c012e9a0 find_vma 214 1.6719 >> c012e780 avl_rebalance 160 0.4762 > > Looks like you're doing a lot of mmapping or faulting requiring VMA > lookups, or the number of VMA's associated with a task makes the > various VMA manipulations extremely expensive. > > Can you dump /proc/pid/maps on some of these processes?
Isn't that the magic Oracle 32Kb mmap hack at work here, in order to get a >2Gb SGA?
M.
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