[Catalyst] Resolving performance issues.

[Bill Moseley]

On Tue, Apr 25, 2006 at 04:02:24PM -0500, Wade.Stuart at fallon.com wrote:
> > % time     seconds  usecs/call     calls    errors syscall
> > ------ ----------- ----------- --------- --------- ----------------
> >  31.35    0.009970        9970         1           accept
> >  21.89    0.006963        3482         2           send
> 
> Those look real slow to me.

I'm not clear if the database (which is the target of those sends)
effects those times.  The database is connected via a unix domain
socket.


> I have never used Deamhost before,  are they
> virtualized servers or all running in the same userland.

No, it's a stand alone server.  It' "managed" in that they have their
"control panel" code used to manage the server.

$ uptime
 14:19:22 up 35 days,  3:46,  4 users,  load average: 0.25, 0.30, 0.27


> Can you show me the output of:
> 
> vmstat -s

$ vmstat -s
       513300  total memory
       503568  used memory
       218852  active memory
       251604  inactive memory
         9732  free memory
        28904  buffer memory
       242440  swap cache
      1052248  total swap
       175400  used swap
       876848  free swap
     38575201 non-nice user cpu ticks
      1777435 nice user cpu ticks
     12773759 system cpu ticks
    250598511 idle cpu ticks
            0 IO-wait cpu ticks
            0 IRQ cpu ticks
            0 softirq cpu ticks
    106342906 pages paged in
    113293833 pages paged out
       448685 pages swapped in
       616766 pages swapped out
    702841386 interrupts
   2049418928 CPU context switches
   1142962367 boot time
      3485309 forks


> 
> vmstat -a 1 10

$ vmstat -a 1 10
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
 r  b   swpd   free  inact active   si   so    bi    bo   in    cs us sy id wa
 0  0 175400  13232 249860 217044    1    1     7     9    5    10 13  4 83  0
 0  0 175400  13236 249860 217044    0    0     0     0  217   683  1  3 96  0
 0  0 175400  13496 249604 217044    0    0     0   208  366   703  1 10 89  0
 0  0 175400  13504 249604 217044    0    0     0     0  268   678  0  4 96  0
 0  0 175400  13376 249732 217044    0    0   128     0  227   681  2  3 95  0
 0  0 175400  13376 249732 217044    0    0     0     0  273   681  2  7 91  0
 0  0 175400  13376 249732 217044    0    0     0     0  230   688  0  5 95  0
 0  0 175400  13340 249768 217044    0    0     0    68  300   673 10  5 85  0
 0  0 175400  13336 249772 217044    0    0     0     0  245   713  9  6 85  0


> 
> nstat (think you must be root for this one.. if not go for it)

I've got root.

There's no nstat on this machine.  There's the sysstat package (sar,
iostat, mpstat) though.


$ mpstat 2 5
Linux 2.4.28-grsec+w+fhs6b+gr0501+++p4+c4+gr6b-v6.188 (ifpserver)       04/25/06

14:20:47     CPU   %user   %nice %system %iowait    %irq   %soft   %idle    intr/s
14:20:49     all    0.00    0.00    0.00    0.00    0.00    0.00  100.00    186.50
14:20:51     all    0.00    0.00    1.00    0.00    0.00    0.00   99.00    207.50
14:20:53     all    2.00    0.00    1.00    0.00    0.00    0.00   97.00    233.50
14:20:55     all    4.00    0.00    0.50    0.00    0.00    0.00   95.50    195.50
14:20:57     all    0.50    0.00    0.50    0.00    0.00    0.00   99.00    215.00
Average:     all    1.30    0.00    0.60    0.00    0.00    0.00   98.10    207.60

Doesn't look that bad looking at these numbers.


-- 
Bill Moseley
moseley at hank.org