Kavon Farvardin wrote: > So I installed Fedora 11 recently on my ThinkPad R61, and had 560+ > packages to update. Installing and cleaning the packages has been taking > FOREVER. Almost several hours, I've had to stop it so often (and restart > it with yum-continue-transaction) because it lags my entire system. It's > all IO use too, the CPU is barely being used! > > I have installed a solid state drive in my laptop and it shouldn't be so > slow at deleting or cleaning packages, it's doing one every 5 seconds or > more. Is there some bug with SSDs and yum? (maybe python related as it > seems yum is written in python?) I have no speed issues with anything > else, and when I installed this drive it was a huge overall performance > improvement over my 5400 RPM disk. I'm also using ext4 as it was the > default, and I think a Logical Volume setup instead of a partition based > one (again, default settings). > > What should I do? > There was a thread here from Patrick O'Callaghan that may help. It was about USB flash drives, but it will probably apply to SSDs as well. > Just a quick note to call people's attention to > http://marc-abramowitz.com/archives/2007/02/17/getting-good-performance-out-of-usb-hard-drives-in-linux/. > This is a couple of years old but it worked like a charm for me. > > Briefly, there's a kernel parameter > called /sys/block/sd[a,b,...]/device/max_sectors (for USB drives sda, > sdb etc.). This specifies the maximum size of a disk I/O operation for > USB storage devices in units of 512 bytes, the default value being 240, > i.e. 120KB (see http://www.linux-usb.org/FAQ.html#i5). The max_sectors > value can be changed doing "echo N > ..." as root, and can have a > dramatic effect on write performance for USB devices such as pendrives. Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!
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