IBM 000-8697 User Manual

IBM Informix OnLine Database Server Administrator’s Guide

From

DB-M

onitor, select the Parameters menu, Shared-Memory

option to change the size of either the logical log buffer or the
physical log buffer. Change the value in the appropriate field, either

Logical Log Buffer Size

or

 Physical Log Buffer Size

.

Reinitialize shared memory (take OnLine offline and then to
quiescent mode) for the change to take effect.

To change the value of either

 LOGBUFF

 or

PHYSBUFF

 from the

command line, use an editor to edit the file specified by
$

.

Change the value of either

 LOGBUFF

 or

PHYSBUFF

. Reinitialize

shared memory (take OnLine offline and then to quiescent mode) for
the change to take effect.

Add a chunk when you need to increase the amount of disk space allocated
to a blobspace or dbspace.

Once you add a chunk, you cannot drop it unless you drop the entire
blobspace or dbspace.

Verify that you will not exceed the maximum number of chunks allowed in
your configuration, specified as

CHUNKS

.

If you are adding a chunk to a mirrored blobspace or dbspace, you must also
add a mirror chunk.

You specify an explicit pathname for the chunk. Informix recommends that
you use a linked pathname. (Refer to

for further information about

the benefits of using linked pathnames. Refer to

mation about selecting a chunk pathname. Refer to

 for guidelines

on how to determine where your chunks should be located on disk.)