[asterisk-dev] [Code Review] Rate limit astdb->sync() calls

[Simon Perreault]

On 2010-09-08 22:28, Russell Bryant wrote:
> While the most recent results have been specific to astdb, the more
> important numbers are the effects on SIP registration performance as
> a result of the changes.  That's how we got into astdb, since it was
> identified as one of the bottlenecks when doing SIP registration load
> testing.  I'm not sure how Stefan's test is built, but doing that via
> SIPp is pretty easy (at least as far as SIPp goes).

Yes, we had observed this when testing the performance of our IPv6 port.
We were astounded at the low performance of REGISTER. And it was clear
that fsync() was the culprit.

To reproduce the tests with SIPp, see
<https://issues.asterisk.org/file_download.php?file_id=26541&type=bug>,
section 4.1.

Simon
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