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Full Discussion: Asvc_t values in iostat output
Operating Systems Solaris Asvc_t values in iostat output Post 302948567 by jim mcnamara on Tuesday 30th of June 2015 01:03:28 PM
Old 06-30-2015
The ascv_t time varies all over the place. A SATA 7200rpm disk will be saturated at a lower asvc_t number than a disk with higher rpms.

The point is that those numbers are relative. You have to work with them under various system conditions to really understand what you are seeing. MadeInGermany is giving a good start, but do not jump onto 'fixing' things until you are sure you understand the problems. It could simply be a poorly written piece of code eating a disk for lunch.

That 25 number is mostly baloney. IMO. I have a SAN with huge IOPS capacity. A number like 24 would indicate an unbelievably high load. I could see that by looking at r/s and w/s for that disk. On some other device, it is okay.

If you need help with tuning, consider sarcheck - it does a good job of sroting through sar data and telling you what is happening. IMO
 

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LEARN ABOUT XFREE86

glupartialdisk

GLUPARTIALDISK(3G)														GLUPARTIALDISK(3G)

NAME

       gluPartialDisk - draw an arc of a disk

C SPECIFICATION

       void gluPartialDisk( GLUquadric* quad,
			    GLdouble inner,
			    GLdouble outer,
			    GLint slices,
			    GLint loops,
			    GLdouble start,
			    GLdouble sweep )

PARAMETERS

       quad    Specifies a quadrics object (created with gluNewQuadric).

       inner   Specifies the inner radius of the partial disk (can be 0).

       outer   Specifies the outer radius of the partial disk.

       slices  Specifies the number of subdivisions around the z axis.

       loops   Specifies the number of concentric rings about the origin into which the partial disk is subdivided.

       start   Specifies the starting angle, in degrees, of the disk portion.

       sweep   Specifies the sweep angle, in degrees, of the disk portion.

DESCRIPTION

       gluPartialDisk  renders	a partial disk on the z=0 plane. A partial disk is similar to a full disk, except that only the subset of the disk
       from start through start + sweep is included (where 0 degrees is along the +yaxis, 90 degrees along the +x axis, 180 degrees along  the	-y
       axis, and 270 degrees along the -x axis).

       The partial disk has a radius of outer, and contains a concentric circular hole with a radius of inner. If inner is 0, then no hole is gen-
       erated. The partial disk is subdivided around the z axis into slices (like pizza slices), and also about the z axis into rings  (as  speci-
       fied by slices and loops, respectively).

       With  respect  to orientation, the +z side of the partial disk is considered to be outside (see gluQuadricOrientation).	This means that if
       the orientation is set to GLU_OUTSIDE, then any normals generated point along the +z axis. Otherwise, they point along the -z axis.

       If texturing is turned on (with gluQuadricTexture), texture coordinates are generated linearly such that where r=outer, the value at (r, 0,
       0) is (1.0, 0.5), at (0, r, 0) it is (0.5, 1.0), at (-r, 0, 0) it is (0.0, 0.5), and at (0, -r, 0) it is (0.5, 0.0).

SEE ALSO

       gluCylinder(3G), gluDisk(3G), gluNewQuadric(3G), gluQuadricOrientation(3G), gluQuadricTexture(3G), gluSphere(3G)

																GLUPARTIALDISK(3G)
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