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authorAlvaro Herrera <alvherre@alvh.no-ip.org>2011-05-03 11:34:27 -0300
committerAlvaro Herrera <alvherre@alvh.no-ip.org>2011-05-03 11:34:27 -0300
commit561485709673f4bc05240e891dd9056bdedbbcbc (patch)
tree778cffcb97e709bdbf08166b3cc7818595eba042 /doc/src
parent155743ad3108cd586d56e864d1209b82f9a716f0 (diff)
downloadpostgresql-561485709673f4bc05240e891dd9056bdedbbcbc.tar.gz
postgresql-561485709673f4bc05240e891dd9056bdedbbcbc.zip
Improve description of read/write traffic scalability
Greg Smith, after a suggestion of James Bruce
Diffstat (limited to 'doc/src')
-rw-r--r--doc/src/sgml/high-availability.sgml7
1 files changed, 4 insertions, 3 deletions
diff --git a/doc/src/sgml/high-availability.sgml b/doc/src/sgml/high-availability.sgml
index 5972a45555f..5bb45fea7e9 100644
--- a/doc/src/sgml/high-availability.sgml
+++ b/doc/src/sgml/high-availability.sgml
@@ -188,9 +188,10 @@ protocol to make nodes agree on a serializable transactional order.
<para>
With statement-based replication middleware, a program intercepts
every SQL query and sends it to one or all servers. Each server
- operates independently. Read-write queries are sent to all servers,
- while read-only queries can be sent to just one server, allowing
- the read workload to be distributed.
+ operates independently. Read-write queries must be sent to all servers,
+ so that every server receives any changes. But read-only queries can be
+ sent to just one server, allowing the read workload to be distributed
+ among them.
</para>
<para>