Re: performance of jailed processes

From: Martin Blapp (mb_at_imp.ch)
Date: 03/31/04

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    Date: Wed, 31 Mar 2004 10:00:14 +0200 (CEST)
To: Dag-Erling Smørgrav <des@des.no>

    Hi DES,

    > Specifically, running a query against a remote MySQL server from
    > inside a jail takes an order of magnitude more time than from outside
    > the jail. Tcpdump shows that the TCP packets carrying the result are
    > evenly spaced, so this is not a matter of the server timing out on a
    > DNS lookup or anything like that.

    Could you try the following things ? Use libthr or libpthreads for mysql and
    see if the results are still the same. Do the same test with linux-threads
    (all our mysqls on 4.x with jails use linux-threads and we don't see any
    problems)

    Martin
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