For some reason a number of our servers seem to have started forking too many CROND processes. This appears to have coincided with changing their interface MTUs to 9000 (Gig ethernet), but now that I've set it back to 1500 one of the machines is still having this problem. The load is very high on the machine, but it's perfectly responsive.
Does anyone have any ideas?
Linux seq 2.4.20-20.9smp #1 SMP Mon Aug 18 11:32:15 EDT 2003 i686 i686 i386 GNU/Linux
15:07:39 up 13 days, 4:21, 1 user, load average: 51.02, 51.05, 51.06
170 processes: 169 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 0.0% user 100.0% system 0.0% nice 0.0% iowait 0.0% idle
CPU1 states: 1.0% user 3.0% system 0.0% nice 0.0% iowait 94.0% idle
Mem: 513168k av, 498860k used, 14308k free, 0k shrd, 18572k buff
322052k actv, 53360k in_d, 10964k in_c
Swap: 1044216k av, 48356k used, 995860k free 429540k cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
2003 vmware 5 -10 1552 1008 704 S < 98.9 0.1 18553m 0 vmware-vmx
7550 root 20 0 1040 1040 704 R 3.8 0.2 0:00 1 top
1950 vmware 5 -10 27876 26M 27012 S < 1.9 5.3 1192m 1 vmware-vmx
2034 vmware 5 -10 81276 78M 80360 S < 0.9 15.7 1132m 0 vmware-vmx
From the the ps man page, the "D" flag means "uninterruptible sleep (usually IO)".
# ps auxw|grep CROND root 2415 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2426 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2442 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2453 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2455 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2466 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2480 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2491 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2502 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2515 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2529 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2531 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2542 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2553 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2567 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2578 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2591 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2606 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2608 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2619 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2630 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2644 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2655 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2668 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2682 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2684 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2695 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2706 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2720 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2731 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2744 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2758 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2760 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2771 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2782 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2796 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2818 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2832 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2834 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2845 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2856 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2870 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2881 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2892 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2907 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2909 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2920 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2931 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2943 0.0 0.0 4292 4 ? D Oct21 0:00 CROND root 2807 0.0 0.0 4292 4 ? D Oct21 0:00 CROND
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