Re: [HACKERS] Maybe some more low-hanging fruit in the latestCompletedXid patch.

2008-03-12 Thread Florian G. Pflug
Bruce Momjian wrote: Is this a TODO? It's for from clear that avoing an exclusive ProcArray lock on subxact abort will bring a measurable performance benefit, so probably not. I've actually coded a prototype for this a few months ago, to check if it would bring any benefit at all, though I r

Re: [HACKERS] Maybe some more low-hanging fruit in the latestCompletedXid patch.

2008-03-12 Thread Bruce Momjian
Thanks for the feedback. --- Florian G. Pflug wrote: > Bruce Momjian wrote: > > Is this a TODO? > > It's for from clear that avoing an exclusive ProcArray lock on subxact > abort will bring a measurable performance benefit

Re: [HACKERS] Maybe some more low-hanging fruit in the latestCompletedXid patch.

2008-03-12 Thread Bruce Momjian
Is this a TODO? --- Florian G. Pflug wrote: > Tom Lane wrote: > > "Florian G. Pflug" <[EMAIL PROTECTED]> writes: > >> Currently, we do not assume that either the childXids array, nor the xid > >> cache in the proc array are

Re: [HACKERS] Maybe some more low-hanging fruit in the latestCompletedXid patch.

2007-09-10 Thread Florian G. Pflug
Tom Lane wrote: "Florian G. Pflug" <[EMAIL PROTECTED]> writes: Currently, we do not assume that either the childXids array, nor the xid cache in the proc array are sorted by ascending xid order. I believe that we could simplify the code, further reduce the locking requirements, and enabled a tra

Re: [HACKERS] Maybe some more low-hanging fruit in the latestCompletedXid patch.

2007-09-10 Thread Tom Lane
"Florian G. Pflug" <[EMAIL PROTECTED]> writes: > Currently, we do not assume that either the childXids array, nor > the xid cache in the proc array are sorted by ascending xid order. > I believe that we could simplify the code, further reduce the locking > requirements, and enabled a transaction to