Asterisk 13 Mixmonitor – Random Missing Syllables

Home » Asterisk Users » Asterisk 13 Mixmonitor – Random Missing Syllables
Asterisk Users 7 Comments

hi,

i have strange problem with asterisk 13 mixmonitor, recording to wav
(CentOS6)
when the system is under load, there are sometimes missing syllable

there arent BIG spikes on cpus recordings are to ramdisk (/dev/shm)

any hints?

7 thoughts on - Asterisk 13 Mixmonitor – Random Missing Syllables

  • First, try recording to a real disk (preferrably a separate drive, so nothing else will be seeking the heads about; and connected by SATA, not USB, for full speed). Does that work any better?

    —
    AJS

    Note: Originating address only accepts e-mail from list! If replying off-
    list, change address to asterisk1list at earthshod dot co dot uk .

    —

  • Dne 27.1.2016 v 13:14 A J Stiles napsal(a):
    i tried before. IO is not the problem

    —
    —————————————
    Marek Cervenka
    =======================================

    —

  • Are you saying that it records fine when you use a real disk, but not with a ramdisk?

    And why are you using a ramdisk for your mixmonitor recordings?

    —
    AJS

    Note: Originating address only accepts e-mail from list! If replying off-
    list, change address to asterisk1list at earthshod dot co dot uk .

    —

  • Dne 27.1.2016 v 17:50 A J Stiles napsal(a):
    i have problem in both scenarios im using ramdisk because is faster and IO cannot be problem

    —
    —————————————
    Marek Cervenka
    =======================================

    —

  • when you say load – how many concurrent calls? Is there transcoding happening? sip / PRIs ? what load?

  • Dne 28.1.2016 v 13:37 Brian :: napsal(a):

    12 concurrent calls

    no transcoding

    SIP

    under 1.5 with 4x 1Ghz vcpus (its vmware VPS)

  • 12 calls isn’t under any type of load.

    Someone with better understanding of Asterisk internals may chime in here.

    Could it be vmware timing? Is timing critical when using mixmonitor?

    I’ve seen > 100 concurrent calls being recorded wtihout issue.