I want to share one of case that we solved last days about Linux and Brocade SAN switch. Problem observed by application admin that queries take too much time. It was a typical I/O performance problem when they checked application and db sites. There was some tests, which have almost done by system admin when […]
I have added some comparisons about T & M Series Oracle Sparc Servers. All information has been taken from Oracle documentation. You can check also Oracle Solaris Engineered System from this link. The Processor is primary driver that how fast a computer work. Even with the rest of system having instantaneous performance , always CPU ‘ll say the […]
Obliviously Exadata X6 will be faster and flexible then the earlier version.Here I have given some comparisons between exadata version with full configuration based on Oracle Documentation. Metric X4 X5 X6 CPU 2 Twelve-Core Intel® Xeon® E5-2697 v2 Processors (2.7GHz) 1 or 2 processors with 18 Core Intel® Xeon® processor E5-2600 v3 product family […]
Oracle Solaris introduced two new features on Solaris 11 which different from Oracle Solaris 10. There are some changes for “dladm” command and also a new command “ipadm” which will help us to configure network interfaces. Instead of “ifconfig” changes made by “dladm” and also “ipadm” are persistend across reboot. “dladm” helps administrator two perform […]
At this post I ‘ll provide the information how to analyze crash dump file for Oracle Solaris.It helps to find out the root cause of crash dump also hang.If your system installed properly then there must be a separated raw device which size is as much as physical memory. Dump device size is related to physical […]
This post focuses on dtrace and truss command usages and benefits for Oracle Solaris 10 Operating System.Dtrace is a debugging tool which used in Oracle Solaris. One of customer getting an unexpected error from java process . This process getting a sigterm signal.Application vendor couldn’t find which process sending sigterm signal to their application. I […]
Memory bottlenecks are evidenced by two different things happening on the system. Paging Page in;something is moved into Active RAM whether that is from Inactive RAM, the swapfile(s), or another file on the hard drive. Page out;anything is moved out from Active RAM to Inactive RAM, as well as writing to a Swapfile. Also in […]
ZFS has a cache algorithm which named ARC (Adaptive replacement cache). In general the ARC allocates as much memory as it is available.To prevent high memory usage, you would like to limit the ZFS ARC to xx GB, which makes sense to me (so you always have some RAM free for applications), please follow this documentation. […]