This is one of those myths that won't die. Unless you have WAY too much
storage, VM will page. the use of expanded storage is the ONLY way to create a
paging hierarchy in z/VM. If it's configured, Xstore is used preferentially as
page space until it fills. Then, the oldest pages in XSTORE are migrated to
DASD page space. With large central stores, the need is often less, but it
hasn't gone away.
Marty
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Marty Zimelis
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-----Original Message-----
From: VM/ESA and z/VM Discussions [mailto:[EMAIL PROTECTED]
Behalf Of Duane Weaver
Sent: Wednesday, December 14, 2005 4:20 PM
To: [email protected]
Subject: Re: How Do I Make Use of the Extra 4G Memory?
I thought the need for expanded storage was being eliminated. Is that
in 5.2 or a later release?
At 04:03 PM 12/14/2005, you wrote:
>If the LPAR running the VSEs still needs 4G, allocate it to the
>LPAR, leave the rest for the Linux LPAR. If the VSE LPAR can get by
>with less, absolutely steal it for the Linux LPAR (it will need
>it). Don't forget to set aside some for expanded on each LPAR.
>
>anson wrote:
>>We recently upgraded our CPU from an MP3000 to an 8G z/890 machine. The
>>configuration is 2 LPARS running z/VM 5.1 on both sides. One side runs
>>multiple VSEs, and the other runs multiple Linux S/390. Now the
>>question is, since z/VM only supports up to 2G central storage,
>>what/how can I make use of the extra 4G memory?
>>Anson Ngai
>>VM/VSE Systems Programmer.
>
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>VM Assist, Inc.
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