[PERFORM] Small Queries Really Fast, Large Queries Really Slow...

2010-06-24 Thread Tom Wilcox
Hi again! I have finally got my Ubuntu VirtualBox VM running PostgreSQL with PL/Python and am now looking at performance. So here's the scenario: We have a great big table: cse=# \d nlpg.match_data Table "nlpg.match_data" Column | Type |

Re: [PERFORM] requested shared memory size overflows size_t

2010-06-17 Thread Tom Wilcox
On 17/06/2010 22:41, Greg Smith wrote: Tom Wilcox wrote: Any suggestions for good monitoring software for linux? By monitoring, do you mean for alerting purposes or for graphing purposes? Nagios is the only reasonable choice for the former, while doing at best a mediocre job at the latter

Re: [PERFORM] requested shared memory size overflows size_t

2010-06-16 Thread Tom Wilcox
Thanks. I will try with a more sensible value of wal_buffers.. I was hoping to keep more in memory and therefore reduce the frequency of disk IOs.. Any suggestions for good monitoring software for linux? On 15/06/2010 00:08, Robert Haas wrote: On Mon, Jun 14, 2010 at 2:53 PM, Tom Wilcox

Re: [PERFORM] requested shared memory size overflows size_t

2010-06-14 Thread Tom Wilcox
l and manage. On Mon, Jun 14, 2010 at 7:41 PM, Tom Wilcox <mailto:hungry...@gmail.com>> wrote: Hi Dave, I am definitely able to switch OS if it will get the most out of Postgres. So it is definitely a case of choosing the OS on the needs if the app providing it is

Re: [PERFORM] requested shared memory size overflows size_t

2010-06-14 Thread Tom Wilcox
r less overhead loss than either Hyper-V (which I presume you are using) or VMWare Workstation for NT (kernels). If it's a Windows-only policy, then perhaps you can run those traps in reverse, and switch to a Windows database, i.e. Microsoft SQL Server. Cheers Dave On Mon, Jun 1

Re: [PERFORM] requested shared memory size overflows size_t

2010-06-14 Thread Tom Wilcox
Can WAL files have their own disk? Is the workload OLTP or OLAP, or a mixture of both? There is more that goes into tuning a PG server for good performance than simply installing the software, setting a couple of GUCs and running it. Bob --- On Thu, 6/10/10, Tom Wilcox wrote: From: Tom

Re: [PERFORM] requested shared memory size overflows size_t

2010-06-02 Thread Tom Wilcox
Hi, Sorry to revive an old thread but I have had this error whilst trying to configure my 32-bit build of postgres to run on a 64-bit Windows Server 2008 machine with 96GB of RAM (that I would very much like to use with postgres). I am getting: 2010-06-02 11:34:09 BSTFATAL: requested share