7/23/2019 Solaris Health Check Tips
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Sun Solaris Server Health CheckYou can perform the below
important checks to get the Sun Solaris Server HealthCheck :
1) Check the load average.The "uptime" command prints the
current time, the length of time the system hasbeen up, and the
average number of jobs in the run queue over the last 1, 5 and
15 minutes
2) CPU utilisation."sar -u" command checks teh CPU
Utilisation.%usr - portion of time running in user mode%sys -
running in system mode%wio - idle with some process waiting for
block I/O%idleidle STATE.
3) The "prstat -a" output provides the Memory utilisation of top
processes.report active process statistics, Report information
about processes and users.In this mode prstat displays separate
reports about processes and users at the s
ame time.
Lightweight ProcessesA lightweight process can be considered as
the swappable portion of a kernel thread.Another way to look at a
lightweight process is to think of them as "virtual CPUs" which
perform the processing for applications. Application threads are
attached to available lightweight processes, which are attached to
a a kernel thread,which is scheduled on the system's CPU dispatch
queue
Zombie ProcessesWhen a process dies, it becomes a zombie
process. Normally, the parent performsa wait() and cleans up the
PID. Sometimes, the parent receives too many SIGCHLD
signals at once, but can only handle one at a time.
4) Third Party utility "top"This utility provides various
details like Load Average, CPU state, Physical Memory Utilisation
and Swap Utilisation, IO Wait.
5) Check bottlenecks with vmstat(Virtual Memory) output"vmstat 2
5"r in run queueb blocked for resources I/O, paging, and so forthw
swapped
6) Check swap utilisationswap l ; swap -s
7) Check any disk failure or any other disk related
errors"metastat egrep -i 'syncunavaimainError" (for SVM)" vxprint
egrep "DISDETSTALESYNCOFFLNODEVFAILRLOC" (for Veritas)
8) Check if any File System is fulldf kdu -dok / sort -nr
head(Listing the Disk Usage)
9) Check for the disk I/O statistics"iostat xcn 2 5"Read /
Write
