database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-30 11:03:19 +03:00
Code Activity

I have run pg_autovacuum on AIX, so that can, at least loosely, be

Browse Source 
considered "tested."

And I have turned all of the 7.4 HISTORY material into DocBook for
release.sgml

Christopher Browne
This commit is contained in:
Bruce Momjian
2003-10-16 03:47:28 +00:00
parent 37278c063f
commit 62fdc3dd60
2 changed files with 584 additions and 89 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
contrib/pg_autovacuum/README.pg_autovacuum
View File

@ -30,15 +30,17 @@ KNOWN ISSUES:
-------------
pg_autovacuum has been tested under Redhat Linux (by me) and Debian
GNU/Linux and Solaris (by Christopher B. Browne) and all known bugs
have been resolved. Please report any problems to the hackers list.
GNU/Linux, Solaris, and AIX (by Christopher B. Browne) and all known
bugs have been resolved. Please report any problems to the hackers
list.
pg_autovacuum requires that the statistics system be enabled and
reporting row level stats. The overhead of the stats system has been
shown to have a significant cost under certain workloads. For instance,
a tight loop of queries performing "select 1" was found to run nearly
30% slower when stats were enabled. However, in practice, with more
realistic workloads, the stats system overhead is usually nominal.
shown to have a significant cost under certain workloads. For
instance, a tight loop of queries performing "select 1" was found to
run nearly 30% slower when stats were enabled. However, in practice,
with more realistic workloads, the stats system overhead is usually
nominal.
pg_autovacuum does not get started automatically by either the
postmaster or by pg_ctl. Similarly, when the postmaster exits, no one
@ -67,6 +69,10 @@ excluded from being vacuumed. It would probably make sense to
introduce this sort of functionality by providing arguments to specify
the database and schema in which to find a configuration table.
It would also be desirable for the daemon to monitor how busy the
system is, with a view to deferring vacuums until there is less other
activity.
INSTALL:
--------
@ -78,7 +84,8 @@ installed for you.
If you are using an earlier version of PostgreSQL, uncompress the
tar.gz file into the contrib directory and modify the contrib/Makefile
to include the pg_autovacuum directory. pg_autovacuum will then be
built as part of the standard postgresql install.
built as part of the standard postgresql install. It is known to work
with v7.3 releases; it is not presently compatible with v7.2.
make sure that the following are set in postgresql.conf: