what if native systemd service is slower than old sysvinit script?

Steve Clark sclark at netwolves.com
Wed Sep 14 16:04:01 UTC 2011

On 09/14/2011 11:28 AM, Tom Lane wrote:
> =?ISO-8859-2?Q?Miloslav_Trma=E8?=<mitr at volny.cz>  writes:
>> 2011/9/14 "Jóhann B. Guðmundsson"<johannbg at gmail.com>:
>>> An simple test to measure this reliably is to strip down the legacy sysv
>>> init script to the start up command only and have a strip down unit file to
>>> the startup command only.
>>> Then time the startup of either.
>> Why?  The current numbers show that the service file is _slower_ even
>> when the old init script is supposedly doing much more work in shell.
>> If anything, stripping the unessential parts should make the service
>> file _even slower_ in relative terms.
> Yes.  The unit file is already stripped down: it does nothing except
> "pg_ctl start".  The init script had accumulated a whole lot of
> perhaps-unnecessary sanity-checking, which frankly I'd rather have kept
> but the systemd mantra seems to be "no shell scripting" so I didn't.
> Michal's numbers look pretty damning, and I find it remarkable that the
> systemd advocates seem to have managed not to read them, let alone admit
Don't confuse we with facts! I've already made up my mind! ;-)
> that they suggest something's seriously wrong.
> 			regards, tom lane

Stephen Clark
Sr. Software Engineer III
Phone: 813-579-3200
Fax: 813-882-0209
Email: steve.clark at netwolves.com
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