1. I could see one shortcoming in the way the patch has currently parallelize the
work for --analyze-in-stages. Basically patch is performing the work for each stage
for multiple tables in concurrent connections that seems okay for the cases when
number of parallel connections is less than equal to number of tables, but for
the case when user has asked for more number of connections than number of tables,
then I think this strategy will not be able to use the extra connections.
2. Similarly for the case of multiple databases, currently it will not be able
to use connections more than number of tables in each database because the
parallelizing strategy is to just use the conncurrent connections for
tables inside single database.
I am not completely sure whether current strategy is good enough or
we should try to address the above problems. What do you think?
3.
+ do
+ {
+ i = select_loop(maxFd, &slotset);
+ Assert(i != 0);
Could you explain the reason of using this loop, I think you
want to wait for data on socket descriptor, but why for maxFd?
Also it is better if you explain this logic in comments.
4.
+ for (i = 0; i < max_slot; i++)
+ {
+ if (!FD_ISSET(pSlot[i].sock, &slotset))
+ continue;
+
+ PQconsumeInput(pSlot[i].connection);
+ if (PQisBusy(pSlot[i].connection))
+ continue;
I think it is better to call PQconsumeInput() only if you find
connection is busy.
With Regards,
Amit Kapila.
EnterpriseDB:
http://www.enterprisedb.com
