<html><body><p><tt><font size="2">"Linuxppc-users" <linuxppc-users-bounces+willschm=us.ibm.com@lists.ozlabs.org> wrote on 11/12/2018 10:37:37 AM:<br><br>> From: "Stephen Lutz" <Stephen.Lutz@de.ibm.com></font></tt><br><tt><font size="2">> To: linuxppc-users@lists.ozlabs.org</font></tt><br><tt><font size="2">> Date: 11/12/2018 11:05 AM</font></tt><br><tt><font size="2">> Subject: [Linuxppc-users] Total I/O Memeory Entitlement vs Online Memory?</font></tt><br><tt><font size="2">> Sent by: "Linuxppc-users" <linuxppc-users-bounces<br>> +willschm=us.ibm.com@lists.ozlabs.org></font></tt><br><tt><font size="2">> <br>> Hi all,<br>> <br>> I got a question from a customer, perhaps somebody can answer that:<br>> <br>> In a SLES Linux LPAR (for SAP HANA) with 4 TB the customer sees with<br>> the lparstat command:<br>> <br>> Online Memory : 4277701632 kB --> /1024 /1024 = ~4079 GB<br>> <br>> Total I/O Memory Entitlement: 4398046511104 /1024 /1024 /1024 = 4096 GB<br>> <br>> --> Difference ~17 GB<br>> <br>> The question is, why is there a difference? What are the 17 GB used <br>> for? As far as I understood, this is no Hypervisor memory, as this <br>> memory is inside the LPAR ...<br></font></tt><br><tt><font size="2">Hi,</font></tt><br><br><tt><font size="2">Per a glance at lparstat pages, looks like "Total I/O Memory Entitlement" is the size of the pool, so likely no distinction between available and used memory on that data point.</font></tt><br><br><tt><font size="2">If you/they look at dmesg output, or /var/log/boot.msg , there will be a line that reads "Memory: ###k/###k available ( ###k kernel code, ..." </font></tt><br><tt><font size="2">Do the numbers associated with kernel, reserved,... there make up the difference?</font></tt><br><br><tt><font size="2">thanks,</font></tt><br><tt><font size="2">-Will</font></tt><br><br><BR>
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