Observability, debugging, and tuning feature changes include the following:
DTrace features – DTrace feature changes include the following:
errexit option – An additional DTrace consumer option that specifies whether a DTrace script should exit upon encountering an error has been added. This enhancement changes the previous DTrace behavior, where an error is reported, but the script does not terminate.
llquantize() action – Support for a new linear-log quantize aggregating action has been added. This aggregating action enables you to collect data in linear-step buckets (similar to the existing lquantize() action) across multiple magnitudes simultaneously.
Scalability improvements – Internal processing for DTrace includes some scalability improvements that support better performance on larger systems.
Structure and bitfield enhancements – The expected behavior of user-defined structures and bitfields has been modified to adhere to the appropriate ABI specification for padding. This change might require you to remove any variables that were previously introduced as a workaround from your DTrace scripts.
tracemem() enhancements – This action includes an additional argument that specifies the number of bytes to display, which might be less than the number of bytes that was traced.
For additional information, see Oracle Solaris 11.3 DTrace (Dynamic Tracing) Guide.
Observing users and processes – Use the netstat command with the –u option with to observe which users and processes are responsible for network connections. See netstat(1M) and Displaying User and Process Information in Administering TCP/IP Networks, IPMP, and IP Tunnels in Oracle Solaris 11.3.
System tuning features – The following system tuning feature enhancements have been made:
NFS-related SMF configuration parameter changes – The network/nfs/server service includes the nfs-props property group, which provides configurable parameters for controlling the refresh of the NFS authentication cache and the mountd netgroup cache. See Chapter 4, NFS Tunable Parameters in Oracle Solaris 11.3 Tunable Parameters Reference Manual.
Oracle Solaris ZFS tunable parameters flash storage changes – When using ZFS with Flash storage, refer to Chapter 3, Oracle Solaris ZFS Tunable Parameters in Oracle Solaris 11.3 Tunable Parameters Reference Manual for updated information pertaining to the following:
F20 PCIe Accelerator Card
F40 PCIe Accelerator Card
F80 PCIe Accelerator Card
F5100 Flash Storage Array