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3-94 IBM Informix OnLine Database Server Administrator’s Guide
Add a Chunk
From DB-Monitor
1. From DB-Monitor, 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.
2. Reinitialize shared memory (take OnLine offline and then to
quiescent mode) for the change to take effect.
From the Command Line
1. To change the value of either LOGBUFF or PHYSBUFF from the
command line, use an editor to edit the file specified by
$INFORMIXDIR/etc/$TBCONFIG.
2. 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
Add a chunk when you need to increase the amount of disk space allocated
to a blobspace or dbspace.
Preliminary Considerations
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 page 1-22 for further information about
the benefits of using linked pathnames. Refer to page 2-93 for further infor-
mation about selecting a chunk pathname. Refer to page 1-43 for guidelines
on how to determine where your chunks should be located on disk.)