Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

You can use the maxautogrow attribute to limit the maximum size to which a cache
can grow. To estimate this size, consider how much the contents of each source
volume are likely to change between snapshot refreshes, and allow some additional
space for contingency.
If necessary, you can use the vxcache set command to change other autogrow
attribute values for a cache. See the vxcache(1M) manual page for details.
Ensure that the cache is sufficiently large, and that the autogrow attributes are
configured correctly for your needs.
Growing and shrinking a cache
You can use the vxcache command to increase the size of the cache volume that
is associated with a cache object.
The following command specifies the format for growing a cache.
# vxcache [-g diskgroup] growcacheto cache_object size
For example, to increase the size of the cache volume associated with the cache,
mycache, to 2 GB, use the following command:
# vxcache -g mydg growcacheto mycache 2g
To grow a cache by a specified amount, use the following form of the command:
# vxcache [-g diskgroup] growcacheby cache_object size
For example, to increase the size of the cache, mycache, by 1 GB, use the following
command:
# vxcache -g mydg growcacheby mycache 1g
You can similarly use the shrinkcacheby and shrinkcacheto operations to reduce
the size of a cache. See the vxcache(1M) manual page for more information.
Removing a cache
You can remove a cache completely, including the cache object, its cache volume
and all space-optimized snapshots that use the cache.
Administering instant snapshots
Creating a shared cache volume and preparing space-optimized snapshots
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