Profiling could tell you where is the time lost and where is your
program spending time. Having experience with both Oracle and Postgres,
I don't feel that there is much of a difference in the insert speed. I
am not using C++, I am using scripting languages like Perl and PHP and,
as far as inserts go, I don't see much of a difference. I have an
application which inserts approximately 600,000 records into a
PostgreSQL 9.0.1 per day, in chunks of up to 60,000 records every hour.
The table is partitioned and there are indexes on the underlying
partitions. I haven't noticed any problems with inserts. Also, if I use
"copy" instead of the "insert" command, I can be even faster. In
addition to that, PostgreSQL doesn't support index organized tables.
Divakar Singh wrote:
Storage test was simple, but the data (seconds taken) for INSERT test
for PG vs Oracle for 1, 2, 3,4 and 5 indexes was:
PG:
25
30
37
42
45
Oracle:
33
43
50
65
68
Rows inserted: 100,000
Above results show good INSERT performance of PG when using SQL
procedures. But performance when I use C++ lib is very bad. I did that
test some time back so I do not have data for that right now.
------------------------------------------------------------------------
*From:* Scott Marlowe <scott.marlowe@xxxxxxxxx>
*To:* Divakar Singh <dpsmails@xxxxxxxxx>
*Cc:* pgsql-performance@xxxxxxxxxxxxxx
*Sent:* Mon, October 25, 2010 11:56:27 PM
*Subject:* Re: Postgres insert performance and storage
requirement compared to Oracle
On Mon, Oct 25, 2010 at 12:12 PM, Divakar Singh <dpsmails@xxxxxxxxx
<mailto:dpsmails@xxxxxxxxx>> wrote:
> Hello Experts,
> My application uses Oracle DB, and makes use of OCI interface.
> I have been able to develop similar interface using postgreSQL library.
> However, I have done some tests but results for PostgreSQL have not been
> encouraging for a few of them.
Tell us more about your tests and results please.
--
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