-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/21153/
-----------------------------------------------------------
Review request for qpid, Gordon Sim and mick goulish.
Bugs: QPID-5748
https://issues.apache.org/jira/browse/QPID-5748
Repository: qpid
Description
-------
Queue::purgeExpired method (to remove messages from all queues with TTL
expired) currently calls Message::hasExpired() method that calls AbsTime::now()
i.e. ::clock_gettime for every individual message with TTL set.
That system call is redundant to be called in that way. It is enough to call it
once before traversing the very first queue and use the value as an argument.
The patch is not ideal: I would rather see just one function like:
bool ExpiryPolicy::hasExpired(const Message& m, qpid::sys::AbsTime time = 0)
{
if time==0 time=sys::AbsTime::now();
return m.getExpiration() < sys::AbsTime::now();
}
but not sure what value from AbsTime to be used instead of 0 (note that such
value should be get in as short time as possible). And I havent played with
AbsTime class and dont have time now to do so :-/
Diffs
-----
/trunk/qpid/cpp/src/qpid/broker/ExpiryPolicy.h 1592542
/trunk/qpid/cpp/src/qpid/broker/ExpiryPolicy.cpp 1592542
/trunk/qpid/cpp/src/qpid/broker/Message.h 1592542
/trunk/qpid/cpp/src/qpid/broker/Message.cpp 1592542
/trunk/qpid/cpp/src/qpid/broker/Queue.cpp 1592542
Diff: https://reviews.apache.org/r/21153/diff/
Testing
-------
Attached patch improved:
- _traversing_ queues and _checking_ messages with TTL by approx. 10%
- with purging _durable_ expired messages, performance improvement is just 1%
(still better than nothing)
No automated tests run so far (lack of time+HW).
Thanks,
Pavel Moravec
