You can reduce the memory footprint by eliminating all but one
Listener (in non-GUI mode this is provided by the -l flag)

This should reduce the need for GC.

On 08/11/2007, Ian Blavins <[EMAIL PROTECTED]> wrote:
> G'day
>
> That will probably be the JVM doing garbage collection. Nothing much
> happens while it is being done.
>
>
> -----Original Message-----
> From: Bo Yu [mailto:[EMAIL PROTECTED]
> Sent: 07 November 2007 18:38
> To: [email protected]
> Subject: Question: Jmeter on multiple CPU machine
>
> Hi,
>
> I am running jmeter on a 4-CPU machine. The throughput is around 160
> http transactions/sec. Every 50-100 seconds, jmeter is pausing for a
> few seconds not sending out any packets. I relate this to the CPU
> history below. I see that one CPU is 0% idle while other CPU is pretty
> free. I tried jmeter GUI and command line, same result.
>
> Your help is highly appreciated.
>
> Thanks,
> Bo
>
> Linux 2.6.16.21-0.8-smp (PC13)        11/07/2007
>
> 12:39:01 PM     CPU     %user     %nice   %system   %iowait    %steal
> %idle
> 12:39:04 PM     all     47.83      0.00      0.92      0.00      0.00
> 51.25
> 12:39:04 PM       0     83.67      0.00      0.67      0.00      0.00
> 15.67
> 12:39:04 PM       1      0.33      0.00      0.67      0.00      0.00
> 99.00
> 12:39:04 PM       2      8.33      0.00      1.33      0.00      0.00
> 90.33
> 12:39:04 PM       3     98.68      0.00      1.32      0.00      0.00
> 0.00
> 12:39:07 PM     all     47.21      0.00      0.58      0.00      0.00
> 52.21
> 12:39:07 PM       0     80.00      0.00      1.67      0.00      0.00
> 18.33
> 12:39:07 PM       1     51.50      0.00      0.33      0.00      0.00
> 48.17
> 12:39:07 PM       2      7.69      0.00      0.67      0.00      0.00
> 91.64
> 12:39:07 PM       3     49.33      0.00      0.00      0.00      0.00
> 50.67
> 12:39:10 PM     all     48.46      0.00      0.67      0.00      0.00
> 50.88
> 12:39:10 PM       0     78.60      0.00      2.01      0.00      0.00
> 19.40
> 12:39:10 PM       1    100.00      0.00      0.00      0.00      0.00
> 0.00
> 12:39:10 PM       2     14.33      0.00      0.67      0.00      0.00
> 85.00
> 12:39:10 PM       3      1.00      0.00      0.00      0.00      0.00
> 99.00
> 12:39:13 PM     all     47.83      0.00      0.58      0.00      0.00
> 51.59
> 12:39:13 PM       0     84.62      0.00      0.67      0.00      0.00
> 14.72
> 12:39:13 PM       1     90.30      0.00      0.67      0.00      0.00
> 9.03
> 12:39:13 PM       2      6.02      0.00      1.00      0.00      0.00
> 92.98
> 12:39:13 PM       3     10.33      0.00      0.00      0.00      0.00
> 89.67
> 12:39:16 PM     all     47.08      0.00      1.17      0.00      0.00
> 51.75
> 12:39:16 PM       0     80.27      0.00      1.34      0.00      0.00
> 18.39
> 12:39:16 PM       1     12.33      0.00      0.67      0.00      0.00
> 87.00
> 12:39:16 PM       2      8.00      0.00      1.67      0.00      0.00
> 90.33
> 12:39:16 PM       3     88.29      0.00      0.67      0.00      0.00
> 11.04
> 12:39:19 PM     all     47.58      0.00      0.92      0.08      0.00
> 51.42
> 12:39:19 PM       0     82.33      0.00      1.67      0.00      0.00
> 16.00
> 12:39:19 PM       1     16.94      0.00      0.66      0.33      0.00
> 82.06
> 12:39:19 PM       2      8.03      0.00      0.67      0.00      0.00
> 91.30
> 12:39:19 PM       3     82.67      0.00      1.00      0.00      0.00
> 16.33
> 12:39:22 PM     all     48.13      0.00      0.58      0.08      0.00
> 51.21
> 12:39:22 PM       0     83.00      0.00      0.67      0.00      0.00
> 16.33
> 12:39:22 PM       1      1.33      0.00      0.67      0.00      0.00
> 98.00
> 12:39:22 PM       2      8.70      0.00      0.67      0.00      0.00
> 90.64
> 12:39:22 PM       3     99.67      0.00      0.33      0.00      0.00
> 0.00
> 12:39:25 PM     all     47.91      0.00      0.67      0.00      0.00
> 51.42
> 12:39:25 PM       0     83.22      0.00      0.67      0.00      0.00
> 16.11
> 12:39:25 PM       1     89.63      0.00      0.67      0.00      0.00
> 9.70
> 12:39:25 PM       2      9.67      0.00      0.67      0.00      0.00
> 89.67
> 12:39:25 PM       3      9.93      0.00      0.33      0.00      0.00
> 89.74
> 12:39:28 PM     all     48.00      0.00      0.83      0.00      0.00
> 51.17
> 12:39:28 PM       0     72.00      0.00      1.67      0.00      0.00
> 26.33
> 12:39:28 PM       1     99.00      0.00      1.00      0.00      0.00
> 0.00
> 12:39:28 PM       2     20.67      0.00      0.67      0.00      0.00
> 78.67
> 12:39:28 PM       3      0.00      0.00      0.33      0.00      0.00
> 99.67
> 12:39:31 PM     all     47.92      0.00      0.83      0.00      0.00
> 51.25
> 12:39:31 PM       0     70.10      0.00      1.66      0.00      0.00
> 28.24
> 12:39:31 PM       1     99.00      0.00      1.00      0.00      0.00
> 0.00
> 12:39:31 PM       2     21.74      0.00      1.34      0.00      0.00
> 76.92
> 12:39:31 PM       3      0.33      0.00      0.00      0.00      0.00
> 99.67
> 12:39:34 PM     all     47.28      0.00      0.58      0.00      0.00
> 52.13
> 12:39:34 PM       0     82.27      0.00      0.00      0.00      0.00
> 17.73
> 12:39:34 PM       1     98.34      0.00      1.66      0.00      0.00
> 0.00
> 12:39:34 PM       2      8.05      0.00      0.67      0.00      0.00
> 91.28
> 12:39:34 PM       3      0.33      0.00      0.00      0.00      0.00
> 99.67
> 12:39:37 PM     all     41.95      0.00      0.58      0.00      0.00
> 57.46
> 12:39:37 PM       0     60.54      0.00      1.00      0.00      0.00
> 38.46
> 12:39:37 PM       1     99.67      0.00      0.33      0.00      0.00
> 0.00
> 12:39:37 PM       2      6.00      0.00      1.00      0.00      0.00
> 93.00
> 12:39:37 PM       3      1.33      0.00      0.33      0.00      0.00
> 98.34
>
>
> 01:01:49 PM     CPU     %user     %nice   %system   %iowait    %steal
> %idle
> 01:01:52 PM     all     20.97      0.00      0.59      0.00      0.00
> 78.44
> 01:01:52 PM       0     77.59      0.00      1.67      0.00      0.00
> 20.74
> 01:01:52 PM       1      0.67      0.00      0.67      0.00      0.00
> 98.66
> 01:01:52 PM       2      2.33      0.00      0.33      0.00      0.00
> 97.34
> 01:01:52 PM       3      3.04      0.00      0.00      0.00      0.00
> 96.96
>
> 01:01:49 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s
> rxcmp/s   txcmp/s  rxmcst/s
> 01:01:52 PM        lo      4.01      4.01      0.37      0.37
> 0.00      0.00      0.00
> 01:01:52 PM      eth0      0.00      0.00      0.00      0.00
> 0.00      0.00      0.00
> 01:01:52 PM      eth1   1407.02   1457.19      0.00      0.00
> 0.00      0.00      0.00
> 01:01:52 PM      sit0      0.00      0.00      0.00      0.00
> 0.00      0.00      0.00
>
> 01:01:49 PM kbmemfree kbmemused  %memused kbbuffers  kbcached
> kbswpfree kbswpused  %swpused  kbswpcad
> 01:01:52 PM  12772328   3669164     22.32    313820   1423500
> 16779884         0      0.00         0
>
> 01:01:49 PM    totsck    tcpsck    udpsck    rawsck   ip-frag    tcp-tw
> 01:01:52 PM       348        27        11         0         0      6137
>
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