On Wed, Feb 23, 2011 at 9:06 AM, yonatan pingle <yonatan.pingle at gmail.com> wrote: > you should have a look at your I/O disk status. > > try with iostat -dx 5 to see the disk utilization info over time. > when it comes to slowdown on a virtual environment on a Desktop grade > machine, i suspect disk I/O latency and bottleneck as a cause. Thanx, I don't know how to interpret the results (yet), but here's the current output: Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 27.20 0.00 6.80 0.00 448.00 65.88 0.00 0.59 0.35 0.24 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 27.20 0.00 6.80 0.00 448.00 65.88 0.00 0.59 0.35 0.24 dm-0 0.00 0.00 0.00 27.80 0.00 222.40 8.00 0.01 0.35 0.09 0.24 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-7 0.00 0.00 0.00 0.40 0.00 6.40 16.00 0.00 0.00 0.00 0.00 dm-8 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-9 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-12 0.00 0.00 0.00 2.80 0.00 97.60 34.86 0.00 0.00 0.00 0.00 dm-13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-16 0.00 0.00 0.00 3.00 0.00 121.60 40.53 0.00 0.00 0.00 0.00 dm-17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Although, most of those values change the whole time, as such: Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 1.00 0.00 0.80 0.00 17.60 22.00 0.00 0.00 0.00 0.00 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 1.00 0.00 0.80 0.00 17.60 22.00 0.00 0.00 0.00 0.00 dm-0 0.00 0.00 0.00 1.40 0.00 11.20 8.00 0.00 0.00 0.00 0.00 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-7 0.00 0.00 0.00 0.40 0.00 6.40 16.00 0.00 0.00 0.00 0.00 dm-8 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-9 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > > check that your disk is running at its optimal state. > look at some indicators , such the the I/O utilization averages, > server load averages > hddtemp /dev/sda will check for heating ( under high load it might ) > > in any case , you still got plenty of ram to spend. > The HDD temp is 52 degrees Celsius, and according to the SNMP stats, it's been on average between 48 & 54 for the past 3 months now. But, every other server that I just checked is between 16 degree & 38 degrees. This is the hottest machine which means I need to add some extra cooling to it. it's a 1U chassis that we "inherited" when we acquired another company a while ago, and it was (still is to some degree) to move everyone to a new server so we keep it alive for now. root at zaxen01:[~]$ smartctl -l scttemp /dev/sda smartctl version 5.38 [x86_64-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF READ SMART DATA SECTION === SCT Status Version: 3 SCT Version (vendor specific): 522 (0x020a) SCT Support Level: 1 Device State: Active (0) Current Temperature: 52 Celsius Power Cycle Min/Max Temperature: 50/53 Celsius Lifetime Min/Max Temperature: 22/60 Celsius Under/Over Temperature Limit Count: 0/594 SCT Temperature History Version: 2 Temperature Sampling Period: 1 minute Temperature Logging Interval: 1 minute Min/Max recommended Temperature: 0/ 0 Celsius Min/Max Temperature Limit: 0/ 0 Celsius Temperature History Size (Index): 128 (24) Index Estimated Time Temperature Celsius 25 2011-02-23 08:33 52 ********************************* ... ..( 7 skipped). .. ********************************* 33 2011-02-23 08:41 52 ********************************* 34 2011-02-23 08:42 53 ********************************** 35 2011-02-23 08:43 52 ********************************* 36 2011-02-23 08:44 52 ********************************* 37 2011-02-23 08:45 52 ********************************* 38 2011-02-23 08:46 53 ********************************** 39 2011-02-23 08:47 52 ********************************* ... ..( 2 skipped). .. ********************************* 42 2011-02-23 08:50 52 ********************************* 43 2011-02-23 08:51 53 ********************************** 44 2011-02-23 08:52 52 ********************************* ... ..(107 skipped). .. ********************************* 24 2011-02-23 10:40 52 ********************************* -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532