Hi. Maybe what i forgot to tell is that when looking at the database we see many connections like that:
IDLE IN TRANSACTION, mayn (ALL) transaction that are long running, waiting for commit statemet which somehow doesn't happen. And the CPU load on DB and App server is almost 0, so the system does seem to lock up. Romain, last question can 2 or more transaction share the same connection, maybe this could cause some locks to deadlock?.... BR Matej 2015-06-10 20:01 GMT+02:00 Romain Manni-Bucau <[email protected]>: > 2015-06-10 10:59 GMT-07:00 Matej <[email protected]>: > > > Hi Romain. > > > > We lookef for DB locks, but it's only SELECT and INSERT statements, which > > should not cause locking on postgresql. And we also looked for locks > using > > postgresql debuging, analytics. So we suspected the network and the JDBC > > driver, we did some TCP stack tuning, but also no major change. > > > > > was more thinking about locks in the datasource pool than on db side (ie > pool size too small) > > > > Everything does run on VMWARE, so maybe this could be also something to > > look at. We could add some more Tomcat DB pool timeouts, but this is a > > dirty "fix". > > > > set the timeout to maybe 0 to set the app failing is there is not enough > connections in the pool > > > > > > Can this be a phenomen of not enough connections in pool. But I would > > suspect a performance drop not lock. > > > > well i dont see locks in the logs but "locked" which means waiting for > something to happen (getting the connection) > > > > > > Can somebody explain this: is 1 transaction == 1 connection. So > connected > > beans share the same connection and transcation? > > > > by datasource you have 1 connection per transaction yes > > > > > > BR > > > > Matej > > > > 2015-06-10 19:24 GMT+02:00 Romain Manni-Bucau <[email protected]>: > > > > > well before playing with config the idea is to know what happened, is > the > > > network quality the cause for instance? > > > > > > > > > Romain Manni-Bucau > > > @rmannibucau <https://twitter.com/rmannibucau> | Blog > > > <http://rmannibucau.wordpress.com> | Github < > > > https://github.com/rmannibucau> | > > > LinkedIn <https://www.linkedin.com/in/rmannibucau> | Tomitriber > > > <http://www.tomitribe.com> > > > > > > 2015-06-10 10:22 GMT-07:00 Howard W. Smith, Jr. < > [email protected] > > >: > > > > > > > On Wed, Jun 10, 2015 at 1:18 PM, Romain Manni-Bucau < > > > [email protected] > > > > > > > > > wrote: > > > > > > > > > Hi Matej > > > > > > > > > > looks like a database issue for me (stateless pool is waiting for > the > > > > > stateless trying to get the db connection to be released), hasnt > the > > DB > > > > > connection be lost or something like that? > > > > > > > > > > > > > > what is the best way for Matej to improve that? tomcat jdbc pool > > > settings? > > > > > > > > > >
