IBM REDP-4285-00 User Manual

© Copyright IBM Corp. 2007. All rights reserved.

 

Draft Document for Review May 4, 2007 11:35 am

/proc

parameter files in   107

32-bit architectures   11
3-way hand shake   30
64-bit architectures   11

Access Vector Cache   104
ACK packet   30
ACPI

See advanced configuration and power interface

advanced configuration and power interface   61
anticipatory   24, 117–118
apmd   97
arptables   97
autofs   97
AVC

See Access Vector Cache

bandwidth delay product   127
benchmark tools   70–76

functions overview   40
IOzone   72
LMbench   71
netperf   73–76

bind a process to a CPU   81
bind an interrupt to a CPU   7, 109
block device metrics   36
block layer   23–24
block size   124
bonding driver   34
bonding module   34
bottlenecks

analyzing the server’s performance   80
CPU bottlenecks   81–82
disk bottlenecks   84–87
gathering information   78
memory bottlenecks   82–84
network bottlenecks   87–89

bus subdirectory   62

C09 compiler flag   104
cache   21–22
cache optimization   81
Capacity Manager   67–70
cat command   105, 108
CFQ

See Complete Fair Queuing

change management   92
changing kernel parameters   104–108
checksum offload   33
child process   4
chkconfig command   98
clone()   5
collision packets   88
compiling the kernel   104
Complete Fair Queuing   24, 116–118, 122
connection establishment   30

3-way hand shake   30

connection tracking   30
context   6
context switching   6
CPU affinity   81
CPU bottlenecks   81–82

actions   82

CPU scheduler   9–10
cpuinfo command   61
cpuspeed   97
cups   97

daemons   97–100

default   97
tunable   97

data segment   9
deadline   24, 116–117
dirty buffer   22, 110

flushing   22, 110

dirty_ratio   111
disable SELinux   103
disc drives   114
disk bottlenecks   84–87

iostat command   86
solutions   87
vmstat command   85

disk I/O subsystem   19–25

block layer   23–24
cache   21–22
I/O subsystem architecture   20

disk subsystem   113–125

adding drives   87
file system selection   121–125
file system tuning   121–125
hardware considerations   114
I/O elevator selection   116–120
I/O elevator tuning   116–120

dmesg command   94–95
dropped packets   88
duplexing   126
dynamic memory allocation   8