• Linux

    Improving performance by using tmpfs

    Today I analyzed disk reads and writes on a server with iotop and strace and found some interesting possible optimizations. With iotop you can check which processes are reading and writing from the disks. I always press the o, p and a keys in iotop so that it only shows me processes doing I/O and so that it will show accumulated I/O instead of the bandwidth. With the left and right arrows I select on which columns to sort the list. Once you have identified the processes wich are doing much I/O, you can check what they are reading or writing with strace, for example # strace  -f -p $PID …