Help with ZFS arc cache Post: 302479938

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Operating Systems Solaris Help with ZFS arc cache Post 302479938 by jim mcnamara on Monday 13th of December 2010 10:48:26 AM

12-13-2010

Registered User

Correct me where I missed the point - the system allocates 'unused' memory which it gives up when needed. You still have lots of free pages. This an m4000:

Code:

# echo ::memstat |mdb -k
Page Summary                Pages                MB  %Tot
------------     ----------------  ----------------  ----
Kernel                     398633              3114    5%
Anon                      1074821              8397   13%
Exec and libs               58856               459    1%
Page cache                6013479             46980   73%
Free (cachelist)           229681              1794    3%
Free (freelist)            459750              3591    6%

Total                     8235220             64337
Physical                  8213603             64168

Is page cache is out of control? No. The system is doing to this m4000 exactly what you see on your box. Using idle memory to good advantage.

Are you experiecing problems? Really sluggish performance, lots of swapping?

---------- Post updated at 08:48 ---------- Previous update was at 08:42 ----------

Here found it - the Evil Tuning Guide

ZFS Evil Tuning Guide - Siwiki

Read the arc cache section.

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pdf::api2::basic::pdf::page

PDF::API2::Basic::PDF::Page(3pm)			User Contributed Perl Documentation			  PDF::API2::Basic::PDF::Page(3pm)

NAME

       PDF::API2::Basic::PDF::Page - Represents a PDF page, inherits from PDF::API2::Basic::PDF::Pages

DESCRIPTION

       Represents a page of output in PDF. It also keeps track of the content stream, any resources (such as fonts) being switched, etc.

       Page inherits from Pages due to a number of shared methods. They are really structurally quite different.

INSTANCE VARIABLES

       A page has various working variables:

       curstrm
	   The currently open stream

METHODS

   PDF::API2::Basic::PDF::Page->new($pdf, $parent, $index)
       Creates a new page based on a pages object (perhaps the root object).

       The page is also added to the parent at this point, so pages are ordered in a PDF document in the order in which they are created rather
       than in the order they are closed.

       Only the essential elements in the page dictionary are created here, all others are either optional or can be inherited.

       The optional index value indicates the index in the parent list that this page should be inserted (so that new pages need not be appended)

   $p->add($str)
       Adds the string to the currently active stream for this page. If no stream exists, then one is created and added to the list of streams for
       this page.

       The slightly cryptic name is an aim to keep it short given the number of times people are likely to have to type it.

   $p->ship_out($pdf)
       Ships the page out to the given output file context

perl v5.14.2							    2011-03-10					  PDF::API2::Basic::PDF::Page(3pm)