Sean O Sullivan <seanos at seanos.net> wrote: > System : > CentOS 4.2 > 2.6.9-22.0.1.ELsmp > System fully up-to-date. > 3GB RAM > 3ware 9000S card, with Raid5 array. > I think that's about all relevant info ... You have the latest 9.2.1.1 3Ware firmware release, correct? And the latest driver for that release, correct? > Had file on disk (not array), attempted to mv file to > array. Went fine till 2.4GB was copied, then it slowed down > to a meg every few minutes. Free memory was ~50MB > (Typically is 1.5-2GB), and cache was 2.5GB. > Stopped the move, however cache not being cleared out -- > and this issue continues to happen - unsure if it was > always a problem/known issue, it does however only occur when > copying a single file > 2.4GB (I have copied 5+GB of 1+GB > files in the past without issue). Hit the 3Ware's knowlegebse on tweaking the kernel buffer settings for your configuration. They are extremely helpful/useful in this regard. You might have to play with a few settings before it works the most ideal. > Also, saw following in dmesg while this was going on: > Out of Memory: Killed process 12467 (mysqld). > I'll be restarting server later on tonight, which will > 'fix' immediate problem, however just curious on thoughts > in regards to this. Again, everytime I run into this, I hit 3Ware's knowlegebase and find some settings that I play with and they not only solve the problem, but increase performance. And if it persists, you'll be ready to talk to their tech support. A good whitepaper to read on 3Ware 9000 series cards on kernel 2.6 (applicable to your CentOS 4.2 system) is here: http://www.3ware.com/kb/attachments/Linux2.6WP_0701.pdf -- Bryan J. Smith | Sent from Yahoo Mail mailto:b.j.smith at ieee.org | (please excuse any http://thebs413.blogspot.com/ | missing headers)