[wp-trac] [WordPress Trac] #21098: Out of memory errors in XML-RPC
WordPress Trac
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Thu Jun 28 21:47:23 UTC 2012
#21098: Out of memory errors in XML-RPC
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Reporter: koke | Owner:
Type: defect (bug) | Status: new
Priority: normal | Milestone: Awaiting Review
Component: XML-RPC | Version: 3.4
Severity: major | Resolution:
Keywords: mobile dev-feedback |
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Comment (by maxcutler):
I was unsuccessful in my first attempt to do some memory profiling on the
XML-RPC code. Will try again in a week or two when I have more time.
I'm hesitant to implement anything that artificially raises the memory
limit. On shared hosting that may just cause more problems, and those are
the environments that are likely seeing this problem currently anyways.
If we want to return a better error, we'd have to use
[http://www.php.net/manual/en/function.register-shutdown-function.php
`register_shutdown_function`] with [http://us.php.net/error_get_last
`error_get_last`] to catch the fatal exception and do something smarter.
That seems like a major hack though.
If we can find some memory usage optimizations, then great. But I think
the real answer here is that this is the client's problem to deal with. If
any XML-RPC methods do not support paging, then that's a feature we should
add. Also maybe expose memory_limit in wp.getOptions to let client make a
smart decision?
And clients need to be smart about the quantity of data they request.
While multicall might result in fewer HTTP requests on a mobile device,
it's a big load on a server and it's going to require non-trivial memory
on the client to buffer the response and do XML de-serialization. Use
threading or other mobile OS provisions to have multiple XML-RPC requests
in-flight simultaneously and let the network and OS optimize that.
--
Ticket URL: <http://core.trac.wordpress.org/ticket/21098#comment:5>
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