Re: [PERFORM] Summaries on SSD usage?

2011-09-02 Thread Jesper Krogh
On 2011-09-03 00:04, Stefan Keller wrote: 2011/9/2 Scott Marlowe: On Tue, Aug 30, 2011 at 11:23 AM, Stefan Keller wrote: How big is your DB? What kind of reads are most common, random access or sequential? How big of a dataset do you pull out at once with a query. SSDs are usually not a big wi

Re: [PERFORM] Query performance issue

2011-09-02 Thread Jayadevan
Here goesI think it might be difficult to go through all these definitions.. PRGMEMACCMST Table "public.prgmemaccmst" Column|Type | Modifiers --+-+--- cmpcod | character varying(5)

Re: [PERFORM] Summaries on SSD usage?

2011-09-02 Thread Stefan Keller
2011/9/2 Scott Marlowe : > On Tue, Aug 30, 2011 at 11:23 AM, Stefan Keller wrote: > How big is your DB? > What kind of reads are most common, random access or sequential? > How big of a dataset do you pull out at once with a query. > > SSDs are usually not a big winner for read only databases. > I

Re: [PERFORM] Summaries on SSD usage?

2011-09-02 Thread Shaun Thomas
On 09/01/2011 11:14 PM, Jesper Krogh wrote: It is "really expensive" to go over 512GB memory and the performance regression for just hitting disk in a system where you assume everything is in memory is really huge. SSD makes the "edge" be a bit smoother than rotating drives do. Ironically, th