2016-07-15 18:43 GMT+02:00 james <ja...@mansionfamily.plus.com>: > On 15/07/2016 09:28, Craig Ringer wrote: > >> I don't think anyone's considering moving from multi-processing to >> multi-threading in PostgreSQL. I really, really like the protection that >> the shared-nothing-by-default process model gives us, among other things. >> >> As I understand it, the main issue is that it is hard to integrate > extensions that use heavyweight runtimes and are focussed on isolation > within a virtual machine. Its not just > > Perhaps it would be possible for the postmaster (or a delegate process) to > host such a runtime, and find a way for a user process that wants to use > such a runtime to communicate with it, whether by copying function > parameters over RPC or by sharing some of its address space explicitly to > the runtime to operate on directly. > > Such a host delegate process could be explicitly built with multithread > support and not 'infect' the rest of the code with its requirements. > > Using granular RPC is nice for isolation but I am concerned that the > latencies might be high.
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What I know about Oracle, PL/SQL, Java - all is executed as outprocess calls. I am sure, so PL doesn't share process with SQL engine there Regards Pavel > > > > > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers >
