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Re: leave log files open

by Happy-the-monk (Canon)
on Jun 12, 2013 at 13:13 UTC ( #1038463=note: print w/replies, xml ) Need Help??

in reply to leave log files open

Why not?

I close my log files often on the basis of it not requiring that much IO...
but providing safety of the information therein in case of unforseeable behavior of external components*.

Cheers, Sören

*) like databases running out of space, admins killing my processes and other havoc.

(hooked on the Perl Programming language)

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Re^2: leave log files open
by BrowserUk (Pope) on Jun 12, 2013 at 13:51 UTC
    Why not?

    Here's one reason:

    cmpthese -1, { a=>q[ open O, '>', 'log'; for(1..10000){ print O chr(0)x80; } close O; ], b=>q[ for(1..10000){ open O, '>>','log'; print O chr(0)x80; close O; } ] };; (warning: too few iterations for a reliable count) s/iter b a b 1.30 -- -99% a 8.42e-003 15300% --

    A second reason is that the first consumes almost no resource; whereas the second consumes prodigious amounts of it.

    The times before and after the first:

    a 5.546|5.343|0|0 a 5.546|5.343|0|0

    And the second:

    b 5.578|5.343|0|0 b 5.734|6.375|0|0

    Whether you are just impacting every other process on your local server; or being billed for all that addition CPU & IO when running your process in the cloud; incurring 1000's of times more resource use in order to satisfy a dumb tool that is easily silenced is .... Its your dollar, you pick the adjective.

    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

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