Re: [PERFORM] pg bouncer issue what does sv_used column means
Here is some more information pool_mode | transaction We have transactional pooling and our application is set up in such a way that we have one query per transaction. We have set default pool size to 100. This is output . As you guys can see active connection are 100 and 224 are waiting. We are planning to move default pool size to 250. Please suggest if you guys think otherwise pgbouncer=# show pools; database | user| cl_active | cl_waiting | sv_active | sv_idle | sv_used | sv_tested | sv_login | maxwait ---+---+---++---+-+-+---+--+- pgbouncer | pgbouncer | 2 | 0 | 0 | 0 | 0 | 0 |0 | 0 site | feature | 418 | 0 |20 | 17 | 0 | 0 |0 | 0 site | service | 621 |224 | 100 | 0 | 0 | 0 |0 | 0 site | zabbix| 0 | 0 | 0 | 0 | 0 | 0 |0 | 0 Prabhjot Singh Database Administrator CLASSMATES 1501 4th Ave., Suite 400 Seattle, WA 98101 206.301.4937 o 206.301.5701 f From: Sheena, Prabhjot Sent: Friday, June 12, 2015 10:57 AM To: 'pgsql-gene...@postgresql.org'; 'pgsql-performance@postgresql.org' Subject: pg bouncer issue what does sv_used column means Guys we see spike in pg bouncer during the peak hours and that was slowing down the application. We did bump up the connection limit and it is helpful but now we again notice little spike in connection. And one thing that I notice that is different is jump in sv_used value when I run command show pools during problem times Can anyone please explain what value of sv_used means when i run show pools; Regards Prabhjot
Re: [PERFORM] pg bouncer issue what does sv_used column means
Unsubscribe On Fri, Jun 12, 2015 at 8:57 PM, Sheena, Prabhjot prabhjot.si...@classmates.com wrote: Guys we see spike in pg bouncer during the peak hours and that was slowing down the application. We did bump up the connection limit and it is helpful but now we again notice little spike in connection. And one thing that I notice that is different is jump in sv_used value when I run command show pools during problem times *Can anyone please explain what value of sv_used means when i run show pools;* Regards *Prabhjot *
Re: [PERFORM] pg bouncer issue what does sv_used column means
Please do not cross-post on the PostgreSQL lists. Pick the most appropriate list to post to and just post there. cheers andrew -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
Re: [PERFORM] pg bouncer issue what does sv_used column means
On Fri, Jun 12, 2015 at 09:37:36PM +, Sheena, Prabhjot wrote: Here is some more information pool_mode | transaction We have transactional pooling and our application is set up in such a way that we have one query per transaction. We have set default pool size to 100. This is output . As you guys can see active connection are 100 and 224 are waiting. We are planning to move default pool size to 250. Please suggest if you guys think otherwise pgbouncer=# show pools; database | user| cl_active | cl_waiting | sv_active | sv_idle | sv_used | sv_tested | sv_login | maxwait ---+---+---++---+-+-+---+--+- pgbouncer | pgbouncer | 2 | 0 | 0 | 0 | 0 | 0 |0 | 0 site | feature | 418 | 0 |20 | 17 | 0 | 0 |0 | 0 site | service | 621 |224 | 100 | 0 | 0 | 0 |0 | 0 site | zabbix| 0 | 0 | 0 | 0 | 0 | 0 |0 | 0 Prabhjot Singh Database Administrator CLASSMATES 1501 4th Ave., Suite 400 Seattle, WA 98101 206.301.4937 o 206.301.5701 f From: Sheena, Prabhjot Sent: Friday, June 12, 2015 10:57 AM To: 'pgsql-gene...@postgresql.org'; 'pgsql-performance@postgresql.org' Subject: pg bouncer issue what does sv_used column means Guys we see spike in pg bouncer during the peak hours and that was slowing down the application. We did bump up the connection limit and it is helpful but now we again notice little spike in connection. And one thing that I notice that is different is jump in sv_used value when I run command show pools during problem times Can anyone please explain what value of sv_used means when i run show pools; Regards Prabhjot Hi Parbhjot, The spike in pgbouncer during peak hours just indicates that you are busier then. How many sv_active do you have in non-peak hours? What kind of system is this on? I suspect that your hardware cannot actually handle 100 simultaneous processes at once and if you increase that to 250 processes there is a good likelyhood that your system response will get even worse. Number of CPU to 2x number of CPU is typical for peak performance throughput. Are you using a 50-core system? What do the I/O stats look like? You may be I/O limited. Regards, Ken -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
[PERFORM] pg bouncer issue what does sv_used column means
Guys we see spike in pg bouncer during the peak hours and that was slowing down the application. We did bump up the connection limit and it is helpful but now we again notice little spike in connection. And one thing that I notice that is different is jump in sv_used value when I run command show pools during problem times Can anyone please explain what value of sv_used means when i run show pools; Regards Prabhjot
