Tuning IDE Hard Disk Performance
Performance increases have been reported on massive disk I/O operations by setting the IDE drivers to use DMA, 32-bit transfers and multiple sector modes. The kernel seems to use more conservative settings unless told otherwise. The magic command to change the setting of your drive is “hdparm”. (Далее…)
The “noatime” attribute
Linux has a special mount option for file systems called noatime that can be added to each line that addresses one file system in the 7etc/fstab” file. If a file system has been mounted with this option, reading accesses to the file system will no longer result in an update to the atime information associated with the file like we have explained above. (Далее…)
Increases the system limit on open files
A process on Red Hat 6.0 with kernel 2.2.5 could open at least 31000 file descriptors this way and a process on kernel 2.2.12 can open at least 90000 file descriptors this way. The upper bound seems to be available memory. To increases the number of open files to 90000 for the root account do the following: (Далее…)
The “bdflush” parameters
The bdflush file is closely related to the operation of the virtual memory (VM) subsystem of the Linux kernel and has a little influence on disk usage. This file (/proc/sys/vm/bdflush) controls the operation of the bdflush kernel daemon. We generally tune this file to improve file system performance. By changing some values from the default as shown below, the system seems more responsive; e.g. it waits a little more to write to disk and thus avoids some disk access contention. (Далее…)
General System Optimization
Overview
At this stage of your configuration, you should now have a Linux server well configured and secured. Our server contains the most essential package and programs installed to be able to work properly and the most essential general security configuration. (Далее…)