Обсуждение: Postgres 8.0 windows processes, field testing, and Hibernate
I had a couple of questions about Postgres 8.0 on Windows platforms:
1. Has Postgres 8.0 seen many field deployments yet? What have been the results?
2. When running a test against Postgress, I noticed in the Windows task manager that several postgres.exe processes we're created. What controls the number? Why more than one?
3. Has anyone tried to integrate Hibernate with Postgres 8.0?
Thanks for the info.
Scott
Scott Goldstein wrote: > I had a couple of questions about Postgres 8.0 on Windows platforms: > > 1. Has Postgres 8.0 seen many field deployments yet? What have been > the results? There seems to have been a good take-up. Some people will have been deploying it even before the official release. Accurate numbers are obviously hard to come by, but I'd guess we've had more new users this release than any previous I can recall. > 2. When running a test against Postgress, I noticed in the Windows > task manager that several postgres.exe processes we're created. What > controls the number? Why more than one? You will have (assuming the same as on *nix): 1. Master process - starts all the others 2. One backend per client 3. Stats buffer/collector 4. Auto-vacuum (optional, not really part of the main system yet) This provides good separation between different elements, in case of bugs/crashes. Your postgresql.conf controls how many clients can connect and hence how many processes. > 3. Has anyone tried to integrate Hibernate with Postgres 8.0? Don't know about on Windows, but we seem to get questions regarding Hibernate on the list. It seems to generate some quite clumsy SQL from time to time, but I must admit I've never used it myself. Helpful? -- Richard Huxton Archonet Ltd
Scott Goldstein <sgoldstein@apache.org> writes: > I had a couple of questions about Postgres 8.0 on Windows platforms: > > 1. Has Postgres 8.0 seen many field deployments yet? What have been the > results? I have 8.0.2 in production with zero problems. It's not a high-load installation but it's been completely solid. > 2. When running a test against Postgress, I noticed in the Windows task > manager that several postgres.exe processes we're created. What controls > the number? Why more than one? Postgres is a multiprocess database, not multithread. So you will get a Postgres.exe process for each connection. > 3. Has anyone tried to integrate Hibernate with Postgres 8.0? Our production system uses Hibernate with 8.0 and the corresponding JDBC driver--no problems at all. -Doug