From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02 Description of problem: Seems to be a problem in the updated kernels and the 3ware controller. Comparing the 2.4.18-14 to the updated 2.4.18-24, 2.4.18-26 and 2.4.18-27 with MySQL selects shows the difference in the speed. A 70 million row table can be duplicated ( by doing insert into select * from) in a hour with the 2.4.18-14 but using the updated kernels take over 4 hours. The 3ware is in raid5 mode and the problem exists on several PC's. This problem is not bound to any 1 computer or 3ware model, it seems to be in the 6000 and 7000 series. It is also not just a problem with MySQL, seems to affect a ftp transfer as well. Typically we get 11MBs on a ftp transfer from PC to PC, but with the new kernel we seem to get 2MBs. Anything to do with writing to disk seems to have the problem. Version-Release number of selected component (if applicable): kernel-2.4.18-24.8.0 How reproducible: Always Steps to Reproduce: 1. Install updated kernel 2. 3. Actual Results: I/O slowdown Expected Results: Newer kernel should have speed improvment Additional info:
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