Re: [logs] Apache Logs

From: Marcus J. Ranum (mjrat_private)
Date: Tue Jan 29 2002 - 12:54:46 PST

  • Next message: Bill Burge: "Re: [logs] Apache Logs"

    >As you say,
    >there's way too much in a busy server's access log.
    
    I'm kind of curious about this: does anyone have any numbers they'd
    care to share about logging rates and server log rates? How many
    entries/second does a busy server's access log collect? I assume
    they are stdio buffered so they come in approximately BUFSIZ chunks,
    so it's probably pretty efficient, no? Does anyone have any numbers
    for when syslogd begins to puke? Since it's using unix domain UDP
    (in general) my guess is that the failure mode would be UDP packets
    getting dropped on the output queue: which is system dependent. BSD
    systems will do it differently from STREAMs systems which will
    do it differently from Linux systems, etc, etc.
    
    I guess I've heard a lot of people talk about syslog bogging down under
    load but I've never seen any measures behind the claim; can anyone
    provide some hard information? I don't feel like writing a syslogd torture
    test - has anyone? Are we operating on hearsay?
    
    mjr.
    ---
    Marcus J. Ranum          Chief Technology Officer, NFR Security, Inc.
    Work:                           http://www.nfr.com
    Personal:                      http://www.ranum.com
    
    
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