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Linux 页表分析 Community Blog
作者： 冯少合 目的： 通过一个c语言实例，了解linux页表的组织结果和mmu的工作原理。 通过页表找到一个物理地址， 对比物理地址与虚拟地址的内容是否一致。 运行环境： $ uname -r 3.15.6-200.fc20.x86_64 准备工作 1. 安装crash $ sudo yum install crash 熟悉crash help: http://people.redhat.com/anderson/help.html White Paper: http://people.redhat....
from Blog: IBM中国Linux与虚拟化实验室
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z/VSE internals: Are you aware of one megabyte frames ?
It's again late today, but as you may know, just before vacation these are always long days. Today I want to talk about megabyte (1 MB) frame support in z/VSE. 1 MB frames or large pages are available on z10 and zEnterprise processors. It's more an...
from Blog: z/VSE Blog
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Paging space reference
To monitor paging space utilization: lsps –a or lsps -s To create an additional paging space: mkps -s <#LPs> <vgname> <disk> or smit mkps To activate a paging space: swapon <device file name> To deactivate a...
from Blog: mkm's IBM blog
Modified on by mkemalm
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Flash Saviour Of The Universe?
MartinPacker
Tags:
stgtest
paging
cics
memory
sysevent
dump
db2
z196
zec12
flash
express
dfsort
zflash
13,063 Views
When I first heard of Flash Express as part of the zEC12 announcement -
some time before announcement - I thought of one use case above all,
and one of particularly poignant resonance with some of my readers: Dump capture amelioration. Then, in the marketing...
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DB2 10: Paging through result sets by value using row value comparisons
SergeRielau
Tags:
row
offset
tuple
rows
n
limit
constructor
fetch
value
comparison
paging
first
rownum
6 Comments
39,936 Views
Prelude I have have been engaged in discussions on how to use DB2 for LUW for as long as I have been employed with IBM. Until not too long ago, before I started blogging, the primary platform for such discussion was usenet. And one of the very oldest debates...
from Blog: SQL Tips for DB2 LUW
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Paging through result sets using LIMIT and OFFSET or ROWNUM
SergeRielau
Tags:
first
rows
scrollable
cursor
offset
paging
limit
fetch
2 Comments
132,299 Views
DB2 has had the FETCH FIRST n ROWS ( FFnR ) clause for many years.
FFnR is one of those tricky features that does actually exactly what it claims to do - surprise! A simple test: CREATE TABLE emp(name VARCHAR(10), salary INTEGER); INSERT INTO emp VALUES...
from Blog: SQL Tips for DB2 LUW
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Is your AIX system clocking up overtime?
AnthonyEnglish
Tags:
virtual_memory
vlp
memory
nmon
free_pages
virtual_loaner_program
earl_jew
performance
lpar
uptime
iostat
topas
oracle
vmstat
tuning
aix
statistics
paging
busy
21,078 Views
WHAT A PERFORMANCE! Many
performance commands such as vmstat and iostat can report accumulated statistics since the last reboot. So it's
important to know when that reboot happened. The uptime
command will give you that information. Here is the...
from Blog: AIX Down Under
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If The Cap Doesn't Fit...
... swear at it. :-) No, I KNOW that's not right - but it's (for me) an irresistibly bad pun. And it's a natural reaction, too. :-) In a recent customer situation I looked at the RMF Workload Activity Report data for a number of service classes. One WLM...
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Memory Metrics Now That z/OS Release 8 Is Upon Us
I was asked an interesting question today by a customer - one with dozens of LPARs and therefore not much time to study each one in excruciating detail... "Given that System High UIC (hereafter referred to as 'UIC') behaves differently in z/OS R.8 how should...
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