Hi,
On 2014-05-25 18:05:03 +0200, Tomas Vondra wrote:
> I've been running a few longer pgbench tests (~week), and I've run into
> this:
> number of transactions actually processed: -1785047856
> latency average: -10.846 ms
> tps = -2950.492090 (including connections establishing)
> tps = -2950.492325 (excluding connections establishing)
>
> The instance was doing ~10k tps for a week, which caused overflow of the
> int counter, used to track number of transactions. Hence the negative
> values.
> I think we've reached the time when hardeare capable of doing this is
> pretty common (SSDs, ...), so I think it's time to switch the counter to
> int64.
Especially when it's perfectly possible to do 500k read only
transactions a second...
> printf("number of transactions per client: %d\n", nxacts);
> - printf("number of transactions actually processed: %d/%d\n",
> + printf("number of transactions actually processed: %ld/%d\n",
> normal_xacts, nxacts * nclients);
That's not right though. On windows a long (indicated by the %l) is only
4 bytes wide. Check INT64_FORMAT. That's generated by configure/platform
template files and should always be correct.
Greetings,
Andres Freund
-- Andres Freund http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services
