Re: [GENERAL] New feature: cached foreign keys

2011-07-09 Thread Craig Ringer
On 9/07/2011 8:26 PM, pasman pasmański wrote: Reality is crude, seems than this idea is not as good as i think :( Thanks for answer. No worries. For what it's worth, PostgreSQL caches recently used tuples in shared memory anyway. The OS caches disk data in RAM too. So if the foreign key is

Re: [GENERAL] New feature: cached foreign keys

2011-07-09 Thread pasman pasmański
Reality is crude, seems than this idea is not as good as i think :( Thanks for answer. 2011/7/9, Craig Ringer : > On 9/07/2011 3:06 PM, pasman pasmański wrote: >> Hi. >> >> Today i have an idea for increase performance of foreign keys. After >> search parent record, store ctid in shared memory.

Re: [GENERAL] New feature: cached foreign keys

2011-07-09 Thread Craig Ringer
On 9/07/2011 3:06 PM, pasman pasmański wrote: Hi. Today i have an idea for increase performance of foreign keys. After search parent record, store ctid in shared memory. Subsequent searches look first to the record at stored ctid, and when it is deleted do regular search using index. How many

[GENERAL] New feature: cached foreign keys

2011-07-09 Thread pasman pasmański
Hi. Today i have an idea for increase performance of foreign keys. After search parent record, store ctid in shared memory. Subsequent searches look first to the record at stored ctid, and when it is deleted do regular search using index. Pro: faster searching for common keys when parent table is