| Subject | Re: [firebird-support] index vs page size |
|---|---|
| Author | Ann Harrison |
| Post date | 2019-06-21T11:31:19Z |
On Jun 20, 2019, at 11:10 AM, Nick Upson nu@... [firebird-support] <firebird-support@yahoogroups.com> wrote:
Hi
I have a large 100Gb+ firebird 2.5 database and I'm trying to deal with some performance issues.
One indicator I have found is that several large tables have indexes with a depth of 3 (and one of 4). The guidance I have seen says to increase the page size until the depth is below 3 but the pagesize is already maxed out at 16k. Can anyone suggest other actions I could take.
The guidance should have been three or less, not less than three. One index with four levels should not be a crisis if you have adequate page cache.
Good luck,
Ann
IMPORTANT NOTICE: This e-mail message is intended to be received only by persons entitled to receive the confidential information it may contain. E-mail messages to clients of Telensa may contain information that is confidential and legally privileged. Please do not read, copy, forward, or store this message unless you are an intended recipient of it. If you have received this message in error, please forward it to the sender and delete it completely from your computer system.
Kind Regards,Nick
Nick Upson | Principal Operations Engineeroffice +44 01799 588800 support hotline +44 1799 399200DDI +44 01799 588621telensa.com | @telensa | Linkedin