Solaris Performance Monitoring – Finding CPU / IO / Memory Bottlenecks – Demo Video
This Video presents you the procedure to investigate various performance bottlenecks related to Memory, CPU and IO using the commands iostat, vmstat and prstat.
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Deal with shm – The Shared Memory Segment – filesystem in RHEL-7
In Simple Terms, Shared memory is chunk of memory that can be shared by multiple processes. An application acquires shared memory by making a system call similar to what it would make to acquire conventional memory. The only difference is that each chunk of shared memory...
Solaris IPMP – Diagnosis and Troubleshooting
Symptoms: * mpathd error messages in /var/adm/messages: No test address configured on interface <interface_name> disabling probe-based failure detection on it Test address address is not unique; disabling probe based failure detection on <interface_name> The link has gone down on <interface_name> Successfully failed over from NIC <interface_name1>...
Linux LVM : Cleaning UP stale storage Devices from LVM, after Storage Reclaim
During the last weekend, I have noticed one of the interesting task performed by one of my collegue as part of the storage migration, i have captured the logs from his task. And the actual scenario is : In any Storage migration ( with Host Side...
Solaris 11 – How to Configure Solaris SMF services
How to Modify an SMF Service Property This procedure shows how to modify the property that identifies the user that can start a service. Become an administrator Change the value that is assigned to the start/user property.First, give the FMRI to identify the appropriate service....
Linux Admin Reference – Device Mapper Multipath ( DM-Multipath) Configuration – Red Hat Enterprise Linux 6
In Enterprise Linux Environment, External storage often permits devices to be accessed by multiple physical paths. This improves redundancy and availability. SAN environment Red Hat Enterprise Linux provides the device-mapper-multipath component to manage multipath capable storage and to present multipath devices to applications running on the...
Solaris Networking Troubleshooting
The one problem that is vrey common in every system administrator’s life is network issue, and most of the times it will kill entire day if the root cause/symptoms were misunderstood . Below information will help you to understand some of the basic network issues...
Solaris Troubleshooting NFS : error “NFS mount fails with RPC: Program not registered”
When trying to mount an NFS file system from an NFS server, the mount fails with the error message: mount:<server>:/filesystem not responding: RPC: Program not registered
Solaris10: San/SAS/MPXIO/STMS config files
With the release of Solaris 10 Operating System (OS), the configuration of Storage Area Network (SAN), Serial Attached SCSI (SAS) attached devices, and turning on STMS/MPXIO has changed. This Post details the new ways devices are brought into the operating system, and their configuration files. The...
Configruing NTP Services in Linux ( RHEL5/6)
The NTP service is responsible for maintaining the system time, which is highly important in any environment because so many things rely on time (logs, error messages, applications, and so on). There are a few different roles that your system can have when using NTP. They...
