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Thread: What is "supervise log" process?

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    Administrator Fli's Avatar
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    What is "supervise log" process?



    Hi, i want to ask what is supervise and why these processes use quite high hard disk operations (I/O)?



    at the beginning there is a TID value, so i did:

    lsof -p 715088

    result:

    Code:
    COMMAND      PID USER   FD   TYPE DEVICE SIZE/OFF       NODE NAMEsupervise 715088 root  cwd    DIR   0,23     4096    9410479 /vz/root/190/var/qmail/supervise/authlib/log
    supervise 715088 root  rtd    DIR   0,23     4096    9404419 /vz/root/190
    supervise 715088 root  txt    REG   0,23    20592   21824429 /vz/root/190/usr/bin/supervise
    supervise 715088 root  mem    REG  253,0            21824429 /vz/root/190/usr/bin/supervise (path dev=0,23)
    supervise 715088 root  mem    REG  253,0             9412749 /vz/root/190/lib64/ld-2.5.so (path dev=0,23)
    supervise 715088 root  mem    REG  253,0             9412676 /vz/root/190/lib64/libc-2.5.so (path dev=0,23)
    supervise 715088 root    0r  FIFO    0,6      0t0 2537404618 pipe
    supervise 715088 root    1u   CHR    1,3      0t0   13277416 /vz/root/190/dev/null
    supervise 715088 root    2u   CHR    1,3      0t0   13277416 /vz/root/190/dev/null
    supervise 715088 root    3r  FIFO    0,6      0t0 2537404662 pipe
    supervise 715088 root    4w  FIFO    0,6      0t0 2537404662 pipe
    supervise 715088 root    5w   REG   0,23        0   26378334 /vz/root/190/var/qmail/supervise/authlib/log/supervise/lock
    supervise 715088 root    6r  FIFO   0,23      0t0   26378335 /vz/root/190/var/qmail/supervise/authlib/log/supervise/control
    supervise 715088 root    7w  FIFO   0,23      0t0   26378335 /vz/root/190/var/qmail/supervise/authlib/log/supervise/control
    supervise 715088 root    8r  FIFO   0,23      0t0   26378336 /vz/root/190/var/qmail/supervise/authlib/log/supervise/ok
    so it appears supervise is a qmail thing

    If you run qmail or qmail-smtpd under supervise
    supervise, which monitors a service and restarts it if it dies.
    If you're logging to a supervised log service
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