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In-Reply-To: 
 <7DA4B654C7FEB24C9998EE4867BEE93EBEAC4E@CNMAIL12.cn.utstarcom.com>
References: <7DA4B654C7FEB24C9998EE4867BEE93EBEAC4E@CNMAIL12.cn.utstarcom.com>
From: Andrey Stepachev <octo47@gmail.com>
Date: Fri, 15 Jul 2011 14:16:24 +0400
Message-ID: 
 <CAADCt4+=ffbrcmUk2yUGb8V-4XY2JFyvXPS7ga7vAAWgCL5xTw@mail.gmail.com>
Subject: Re: JNA to avoid swap but physical memory increase
To: user@cassandra.apache.org
Content-Type: multipart/alternative; boundary=20cf3071c6bc452e6e04a818f269

--20cf3071c6bc452e6e04a818f269
Content-Type: text/plain; charset=UTF-8

Looks like mmaped files.

2011/7/15 Donna Li <donna.li@utstar.com>

> **
>
> All:****
>
> I download JNA jar and put it to cassandra lib directory. When restart
> cassandra server, I found the physical memory highly increase. There is no
> data saved in cassandra, why so much memory used by cassandra? How can I
> decrease the memory usage by cassandra? My version is 0.7.6-2.****
>
> ** **
>
> ** **
>
> Before ****
>
> PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND  ****
>
> 11381 root      25   0  **653m**  **57m** 6272 S    0  5.7   0:02.33
> java     ****
>
> ** **
>
> After****
>
> PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND  ****
>
> 11130 root      25   0  **653m** **647m** **9.9m** S    0 64.2   0:03.57
> java       ****
>
> ** **
>
> ** **
>
> Best Regards****
>
> Donna li****
>

--20cf3071c6bc452e6e04a818f269
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Looks like mmaped files.<br><br><div class=3D"gmail_quote">2011/7/15 Donna =
Li <span dir=3D"ltr">&lt;<a href=3D"http://donna.li">donna.li</a>@<a href=
=3D"http://utstar.com">utstar.com</a>&gt;</span><br><blockquote class=3D"gm=
ail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-le=
ft:1ex;">






<u></u>





<div lang=3D"ZH-CN" link=3D"blue" vlink=3D"purple">

<div style=3D"layout-grid:15.6pt">

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">All:<u></u><u></u></span></fon=
t></p>

<p class=3D"MsoNormal" style=3D"text-indent:21.0pt"><font size=3D"1" face=
=3D"Arial"><span lang=3D"EN-US" style=3D"font-size:9.0pt;font-family:Arial"=
>I download JNA jar and put
it to cassandra lib directory. When restart cassandra server, I found the p=
hysical
memory highly increase. There is no data saved in cassandra, why so much me=
mory
used by cassandra? How can I decrease the memory usage by cassandra? My ver=
sion
is 0.7.6-2.<u></u><u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></f=
ont></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></f=
ont></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">Before <u></u><u></u></span></=
font></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">PID USER=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 PR=C2=A0
NI=C2=A0 <font color=3D"red"><span style=3D"color:red">VIRT=C2=A0 RES</span=
></font>=C2=A0
SHR S %CPU %MEM=C2=A0=C2=A0=C2=A0 TIME+=C2=A0 COMMAND=C2=A0 <u></u><u></u><=
/span></font></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">11381 root=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0
25=C2=A0=C2=A0 0 <font color=3D"red"><span style=3D"color:red">=C2=A0<u></u=
>653m<u></u>=C2=A0 <u></u>57m<u></u></span></font> 6272 S=C2=A0=C2=A0=C2=A0=
 0=C2=A0
5.7=C2=A0=C2=A0 0:02.33 java=C2=A0=C2=A0=C2=A0=C2=A0 <u></u><u></u></span><=
/font></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></f=
ont></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">After<u></u><u></u></span></fo=
nt></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">PID USER=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 PR=C2=A0
NI=C2=A0 <font color=3D"red"><span style=3D"color:red">VIRT=C2=A0 RES</span=
></font>=C2=A0
SHR S %CPU %MEM=C2=A0=C2=A0=C2=A0 TIME+=C2=A0 COMMAND=C2=A0 <u></u><u></u><=
/span></font></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">11130 root=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0
25=C2=A0=C2=A0 0=C2=A0 <u></u><font color=3D"red"><span style=3D"color:red"=
>653m</span></font><u></u><font color=3D"red"><span style=3D"color:red"> <u=
></u>647m<u></u></span></font>
<u></u>9.9m<u></u>
S=C2=A0=C2=A0=C2=A0 0 64.2=C2=A0=C2=A0 0:03.57
java=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <u></u><u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></f=
ont></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></f=
ont></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">Best Regards<u></u><u></u></sp=
an></font></p>

<p class=3D"MsoNormal"><font size=3D"1" face=3D"Arial"><span lang=3D"EN-US"=
 style=3D"font-size:9.0pt;font-family:Arial">Donna li<u></u><u></u></span><=
/font></p>

</div>

</div>


</blockquote></div><br>

--20cf3071c6bc452e6e04a818f269--