Обсуждение: Hot-Standby and sequences

Hi All,

I have a question about sequences in combination with streaming replication.
It seems something strange is happening with sequences which are streamed to the slave.

When updating the sequence the last_value on the slave shifts with 32 and halts at this value until the master increased the value also with 32.
Is this normal behavior ?

Please see the example below:

Using Setval
----------------------

# psql -t -h master -c "select setval('foo', 10)"
      10

# psql -t -h master  -c "select last_value from foo"
          10

# psql -t -h slave  -c "select last_value from foo"
          10

Using Nextval
----------------------

# psql -t -h master -c "select nextval('foo')"
       11

# psql -t -h master  -c "select last_value from foo"
          11

# psql -t -h slave -c "select last_value from foo"
         43

-- Wouter D'Haeseleer Linux System Engineer VASCO Data Security Dellingstraat 28b 2800 Mechelen Belgium phone: +32 15 50 44 00 email: wdh@vasco.com web: www.vasco.com