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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="MatStashSetInitialSize"><H1>MatStashSetInitialSize</H1></A>
sets the sizes of the matrix stash, that is used during the assembly process to store values that belong to other processors.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatStashSetInitialSize(Mat mat,PetscInt size, PetscInt bsize)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mat </B></TD><TD>- the matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>size </B></TD><TD>- the initial size of the stash.
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>bsize </B></TD><TD>- the initial size of the block-stash(if used).
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-matstash_initial_size <size> or <size0,size1,...sizep</B></TD><TD>- 1>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-matstash_block_initial_size <bsize> or <bsize0,bsize1,...bsizep</B></TD><TD>- 1>
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
The block-stash is used for values set with <A HREF="../Mat/MatSetValuesBlocked.html#MatSetValuesBlocked">MatSetValuesBlocked</A>() while
the stash is used for values set with <A HREF="../Mat/MatSetValues.html#MatSetValues">MatSetValues</A>()
<P>
Run with the option -info and look for output of the form
MatAssemblyBegin_MPIXXX:Stash has MM entries, uses nn mallocs.
to determine the appropriate value, MM, to use for size and
MatAssemblyBegin_MPIXXX:Block-Stash has BMM entries, uses nn mallocs.
to determine the value, BMM to use for bsize
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatAssemblyBegin.html#MatAssemblyBegin">MatAssemblyBegin</A>(), <A HREF="../Mat/MatAssemblyEnd.html#MatAssemblyEnd">MatAssemblyEnd</A>(), <A HREF="../Mat/Mat.html#Mat">Mat</A>, <A HREF="../Mat/MatStashGetInfo.html#MatStashGetInfo">MatStashGetInfo</A>()
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/interface/matrix.c.html#MatStashSetInitialSize">src/mat/interface/matrix.c</A>
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