On Tue, Nov 25, 2003 at 10:07:56AM -0500, AndyLiebman@aol.com wrote: > A puzzle. > I have a P4-3.06 with 1 GB RAM. I have hyperthreading enabled -- and Mandrake > 9.2 (2.4.22 kernel) shows that I have 2 CPUs. I've seen similar troubles with the SuSE kernels. I believe it has something to do with some of the desktop/interactive patches that fills up memory too much before flushing caches. > Although data is coming into my Linux machine at a rate of 18 MB/sec, I don't > see any disk activity for as much as 30 or 40 seconds after I begin recording > video. Looking at XOSVIEW, I can see on the memory display that the cache > fills up until my memory is almost entirely full, and ONLY THEN does the disk > writing activity begin. > > Usually this is fine, but once in a while -- after capturing video for 20 > minutes or so, the system will have a "hiccup" and fail to write data fast > enough. My video editing application will then stop capturing. I don' Play with the settings of: sysctl -a | grep vm.bdflush vm.bdflush = 30 500 0 0 500 3000 60 20 0 I've found the right settings would alleviate this hiccup issue. HEndrik - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
