sys_attrs_presto - presto subsystem attributes
This reference page lists and describes attributes for the Prestoserve
(presto) kernel subsystem. Refer to the sys_attrs(5) reference page for an
introduction to the topic of kernel subsystem attributes.
The Prestoserve product consists of optional hardware (NVRAM) and software
that must be installed on your system. See the Guide to Prestoserve for
details on Prestoserve. See the System Configuration and Tuning manual for
information about Prestoserve within the context of managing file system
Size, in bytes, of the Prestoserve buffer hash table.
Default value: 256 (bytes)
Minimum value: 0
Maximum value: 65,536 (64 KB)
Increasing the value of the presto_buffer_hash_size attribute may
improve throughput by decreasing Prestoserve lock contention.
A value that controls whether Prestoserve will cache only UFS and AdvFS
file-system metadata or both file-system metadata and synchronous-write
data. If the attribute is set to 1, Prestoserve caches only file-system
metadata. If the attribute is set to 0 (zero), both file-system meta-
data and synchronous-write data are cached.
Default value: 0
Setting prmetaonly to 1 may improve the performance of applications
that access many small files, or applications that access a large
amount of file-system metadata but do not reread recently written data.
Guide to Prestoserve
System Configuration and Tuning