On 2016-01-15 13:17:12 +0300, Vladimir Sitnikov wrote:
> There is a finding that insert(x) values(y);insert(x) values(z); is
> 2-4 times slower than insert(..) values(y),(z);
> see [1], [2].
If you indeed just mean statements like above, without begin/commit, a
large portion of the overhead will
Hi,
There is a finding that insert(x) values(y);insert(x) values(z); is
2-4 times slower than insert(..) values(y),(z);
see [1], [2].
In other words, there is a significant per-statement overhead even
though server-prepared statements are properly used.
The issue is reproducible in 9.5rc1.
Is
>I guess you mean there's a transaction surrounding it?
Sure there is a transaction.
I measure the latency from the first Bind message to the ReadyForQuery response.
The database is at localhost.
The flow is as follows (I've use 4 queries in batch for brevity,
however the test above is executed
