Skipping queue run -- load average too high

Ugo Bellavance ugob at CAMO-ROUTE.COM
Wed Dec 10 14:33:37 GMT 2003


> -----Message d'origine-----
> De : Harry Hanson [mailto:harryh at CET.COM]
> Envoyé : Wednesday, December 10, 2003 12:47 AM
> À : MAILSCANNER at JISCMAIL.AC.UK
> Objet : Re: Skipping queue run -- load average too high
> 
> 
> > > -----Message d'origine-----
> > > De : Harry Hanson [mailto:harryh at CET.COM] Envoyé : Tuesday, 
> > December 
> > > 09, 2003 9:17 PM À : MAILSCANNER at JISCMAIL.AC.UK Objet : Re: 
> > Skipping 
> > > queue run -- load average too high
> > > 
> > > 
> > > Dual 1.6 xeon, 1gb memory, 10k rpm u320 scsi drives in 
> > raid0 config, 
> > > 1gb ram.
> > 
> > What is your daily mail volume?
> 
> Here's and example from midnight to current time:
> 
> Log starts at Dec 9 00 00:01 and ends at Dec 9 21 41:42
> 
> Total bytes transferred: 1496649 
> Total bytes In:  0
> Messages Out: 33742
> Messages In: 0
> 
> Messages per hour (each dot is 181 messages)
> ________________
>   0:    827 ....
>   1:    838 ....
>   2:    745 ....
>   3:    793 ....
>   4:    778 ....
>   5:    804 ....
>   6:    805 ....
>   7:    856 ....
>   8:    781 ....
>   9:    839 ....
>  10:    748 ....
>  11:    871 ....
>  12:    799 ....
>  13:    778 ....
>  14:    823 ....
>  15:   9056 ..................................................
>  16:   6625 ....................................
>  17:   1462 ........
>  18:   1478 ........
>  19:   1383 .......
>  20:   1364 .......
>  21:   1056 .....
>  22:      0
>  23:      0
> 
> 
> > > 
> > > Freebsd 5.1
> > > 
> > > It would seem to me either an I/O issue, as the cpu rarely 
> > exceeds 5% 
> > > useage, or perhaps I have something set too low?
> > > 
> > If you've got vmstat on freebsd, use it... type vmstat 1.
> > 
> > this will tell you if you have processes waiting for I/O.  
> > (see man vmstat)
> 
> My apoligies; I am rather a newbie with freebsd; this is my 
> first. Here's a
> current snapshot (tho I have to read the man page more; it scrolls
> coninually and not sure how to interpret the output): 

You have to stop it with ctrl-c.  To interpret the output, see the manpage for vmstat.  The first column I check is usually the second one (b).  And in your case, is seems ok, because it is 0 or 1 (there is one or zero process waiting for I/O).  I don't have a freebsd box here, so I can't interpret everything.
> 
> 
> procs      memory      page                    disks     
> faults      cpu
>  r b w     avm    fre  flt  re  pi  po  fr  sr aa0 aa1   in   
> sy  cs us sy
> id
>  0 0 0  224380 314004 11724   0   0   0 10377   0  17   0  
> 533    0 2964 34
> 28 38
>  0 1 0  224896 313344  147   0   0   0  41   0   3  57  688   
>  0 1570  2 11
> 87
>  0 0 1  221424 315056   48   0   0   0 469   0   0   5  445   
>  0 595  0  4
> 96
>  0 1 1  224296 313860  331   0   0   0  80   0   0  26  553   
>  0 927  1  5
> 94
>  0 0 1  224332 313400  124   0   0   0  43   0   0  32  626   
>  0 1106  1  5
> 94
>  0 0 1  226080 312884 5447   0   0   0 4632   0   8  32  660  
>   0 1577 16 13
> 71
>  0 0 1  222444 314720  178   0   0   0 685   0   0  56  714   
>  0 1401  1  8
> 91
>  0 0 1  222940 314612  292   0   0   0 305   0   0  30  492   
>  0 782  0  4
> 96
>  0 0 1  223712 314196  113   0   0   0  13   0   0   0  404   
>  0 488  0  4
> 96
>  0 0 3  233728 311680 5302   0   0   0 4153   0  10   0  490  
>   0 981  9 15
> 76
>  0 0 1  220824 315280 3880   0   0   0 4300   0   2   0  593  
>   0 1151 14 10
> 76
>  0 0 1  219360 315836  266   0   0   0 436   0   0  24  553   
>  0 929  1  4
> 95
>  0 2 1  220908 315104  468   0   0   0 315   0   0   7  607   
>  0 1027  1  7
> 92
>  0 0 1  219352 316120  256   0   0   0 557   0   0  43  602   
>  0 1086  1  5
> 94
>  0 1 2  224964 313308 6070   0   0   0 4839   0  20   9  518  
>   0 1083 11 16
> 72
>  0 0 0  221508 315068 3038   0   0   0 3045   0   0  17  641  
>   0 1304 16  8
> 76
>  0 0 0  221552 315000  135   0   0   0 130   0   0  11  496   
>  0 744  0  6
> 94
>  0 0 0  220272 315616  117   0   0   0 303   0  11  36  540   
>  0 914  1  4
> 95
>  0 0 0  220264 315652  362   0   0   0 387   0   0   9  517   
>  0 777  1  4
> 95
>  0 1 1  223036 314032 4288   0   0   0 3483   0  12  19  567  
>   0 1294 11 13
> 76
>  0 0 0  218800 316340 2958   0   0   0 3155   0   0  57  797  
>   0 3355 13 18
> 69
>  0 0 0  215380 318212  488   0   0   0 971   0   0   9  540   
>  0 855  0  7
> 92
>  procs      memory      page                    disks     
> faults      cpu
> 




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