Re: Dtrace probes documentation
От | Joshua Tolley |
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Тема | Re: Dtrace probes documentation |
Дата | |
Msg-id | 20090528232039.GD15201@eddie обсуждение исходный текст |
Ответ на | Re: Dtrace probes documentation (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: Dtrace probes documentation
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Список | pgsql-hackers |
On Thu, May 28, 2009 at 06:28:14PM -0400, Tom Lane wrote: > Joshua Tolley <eggyknap@gmail.com> writes: > > The dtrace probes documentation [1] spells each probe name with dashes > > ("transaction-start", "transaction-commit", etc.). Yet as far as I can see, > > dtrace only works if you spell the probe names with double underscores > > ("transaction__start", "transaction__commit", etc.). Why the discrepancy? > > Read 26.4.3 and .4. I don't know why they have this bizarre set of > conventions, but the single-hyphen version is the spelling > most visible to end users. I thought it might be something like that. I've been playing with SystemTap, and found that only the double-underscore version works for ... well, anything. See http://blog.endpoint.com/2009/05/postgresql-with-systemtap.html for details. Perhaps it's worth noting in the documentation that SystemTap users will need to use the double-underscore version? - Josh / eggyknap
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