Sorry, please disregard. Newer patch being added. ---------------------------------------------------------------------------
Bruce Momjian wrote: > > Your patch has been added to the PostgreSQL unapplied patches list at: > > http://momjian.postgresql.org/cgi-bin/pgpatches > > It will be applied as soon as one of the PostgreSQL committers reviews > and approves it. > > --------------------------------------------------------------------------- > > > Heikki Linnakangas wrote: > > Here's an updated patch that fixes a bug with full_page_writes, and an > > alignment issue in replay code. Also added a new test case to > > crashtest.sh that exercises the fixed bug. > > > > Has anyone looked at this? I now consider it ready for committing, if > > no-one sees a problem with it. > > > > Here's the original description of the patch: > > > > > Currently, an index split writes all the data on the split page to > > > WAL. That's a lot of WAL traffic. The tuples that are copied to the > > > right page need to be WAL logged, but the tuples that stay on the > > > original page don't. > > > > > > Here's a patch to do that. It needs further testing, I have used the > > > attached crude crashtest.sh to test the basics, but we need to test > > > the more obscure cases like splitting non-leaf or root page. > > > > > > On a test case that inserts 10000 rows in increasing key order with a > > > 100 characters wide text-field as key, the patch reduced the total > > > generated WAL traffic from 45MB to 33MB, or ~ 25%. Your mileage may > > > vary, depending on the tuple and key sizes, and the order of inserts. > > > > -- > > Heikki Linnakangas > > EnterpriseDB http://www.enterprisedb.com > > [ application/x-shellscript is not supported, skipping... ] > > > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 3: Have you checked our extensive FAQ? > > > > http://www.postgresql.org/docs/faq > > -- > Bruce Momjian [EMAIL PROTECTED] > EnterpriseDB http://www.enterprisedb.com > > + If your life is a hard drive, Christ can be your backup. + > > ---------------------------(end of broadcast)--------------------------- > TIP 7: You can help support the PostgreSQL project by donating at > > http://www.postgresql.org/about/donate -- Bruce Momjian [EMAIL PROTECTED] EnterpriseDB http://www.enterprisedb.com + If your life is a hard drive, Christ can be your backup. + ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
