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Full Discussion: Load Average threshold
Top Forums UNIX for Dummies Questions & Answers Load Average threshold Post 302380190 by proactiveaditya on Monday 14th of December 2009 01:15:46 PM
Old 12-14-2009
Load Average threshold

What should be the threshold for load average of a quad core processor? What constitutes "good" and "bad" load average values?
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pset_getloadavg(3C)					   Standard C Library Functions 				       pset_getloadavg(3C)

pset_getloadavg - get system load averages for a processor set SYNOPSIS
#include <sys/pset.h> #include <sys/loadavg.h> int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); DESCRIPTION
The pset_getloadavg() function returns the number of processes assigned to the specified processor set that are in the system run queue, averaged over various periods of time. Up to nelem samples are retrieved and assigned to successive elements of loadavg[]. The system imposes a maximum of 3 samples, representing averages over the last 1, 5, and 15 minutes, respectively. The LOADAVG_1MIN, LOADAVG_5MIN, and LOADAVG_15MIN indices, defined in <sys/loadavg.h>, can be used to extract the data from the appropri- ate element of the loadavg[] array. If pset is PS_NONE, the load average for processes not assigned to a processor set is returned. If pset is PS_MYID, the load average for the processor set to which the caller is bound is returned. If the caller is not bound to a pro- cessor set, the result is the same as if PS_NONE was specified. RETURN VALUES
Upon successful completion, the number of samples actually retrieved is returned. If the load average was unobtainable or the processor set does not exist, -1 is returned and errno is set to indicate the error. ERRORS
The pset_getloadavg() function will fail if: EINVAL The number of elements specified is less than 0, or an invalid processor set ID was specified. The caller is in a non-global zone, the pools facility is active, and the specified processor set is not that of the zone's pool. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
uptime(1), w(1), psrset(1M), prstat(1M), pset_bind(2), pset_create(2), Kstat(3PERL), attributes(5) SunOS 5.10 28 Jun 2004 pset_getloadavg(3C)

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