Red Hat ENTERPRISE LINUX 5.4 - SYSTEMTAP BEGINNERS GUIDE Informazioni Techniche Scaricare il pdf (Pagina 15)

PartI.Basics

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 239 240

SUSE Linux 1
Enterprise Server 1
Contents 3
III Kernel Monitoring 69 4
IV Resource Management 113 5
V Kernel Tuning 153 6
16 Tuning the Network 187 7
17 Tracing Tools 193 7
18 kexec and kdump 205 7
A GNU Licenses 221 8
About This Guide 9
1 Available Documentation 10
2 Feedback 12
3 Documentation Conventions 13
PartI.Basics 15
General Notes on System 17
1.2 Rule Out Common Problems 18
1.3 Finding the Bottleneck 18
1.4 Step-by-step Tuning 19
PartII.System Monitoring 21
System Monitoring Utilities 23
2.1.1 vmstat 24
With sadc 27
CPU Utilization Report: sar 28
Memory Usage Report: sar -r 28
2.1.2.3 Visualizing sar Data 30
2.2 System Information 31
Viewer: udevadm monitor 34
2.3 Processes 35
2.3.2 Process List: ps 36
2.3.3 Process Tree: pstree 37
2.3.4 Table of Processes: top 38
2.4 Memory 42
HugePages_Rsvd: 0 44
HugePages_Surp: 0 44
Hugepagesize: 2048 kB 44
DirectMap4k: 2689024 kB 44
DirectMap2M: 5691392 kB 44
2.5 Networking 45
2.6 The /proc File System 49
2.6.1 procinfo 51
2.7 Hardware Information 53
2.8 Files and File Systems 54
Binaries 56
2.8.4 File Properties: stat 56
2.9 User Information 57
2.10 Time and Date 57
2.11 Graph Your Data: RRDtool 58
2.11.2.1 Collecting Data 59
2.11.2.2 Creating Database 60
2.11.3 For More Information 63
Monitoring with Nagios 65
3.3.1 Object Definition Files 67
3.4 Configuring Nagios 69
3.5 Troubleshooting 72
3.6 For More Information 73
Analyzing and Managing 75
System Log Files 75
4.3 Managing Log Files with 78
4.4 Monitoring Log Files with 80
Log Entries 81
PartIII.Kernel Monitoring 83
SystemTap—Filtering and 85
Analyzing System Data 85
5.1.1 SystemTap Scripts 86
5.1.2 Tapsets 86
5.1.3 Commands and Privileges 87
5.2 Installation and Setup 88
5.3 Script Syntax 90
Ctrl + C 91
5.3.3.1 Functions 92
Variables 95
Conditional Statements 96
5.4 Example Script 97
5.5 User-Space Probing 98
5.6 For More Information 99
Kernel Probes 101
6.1 Supported Architectures 102
6.2 Types of Kernel Probes 102
6.3 Kernel probes API 103
6.4 Debugfs Interface 104
6.5 For More Information 105
Perfmon2—Hardware 107
Based Performance 107
Monitoring 107
7.1.2 Sampling and Counting 108
7.2 Installation 109
7.3 Using Perfmon 110
7.4 Retrieving Metrics From 113
interrupt = 115
ovfl_intr_ns / 115
ovfl_intr_all_count 115
7.5 For More Information 116
OProfile—System-Wide 119
Profiler 119
8.4 Using OProfile 120
8.4.1 General Steps 121
8.5 Using OProfile's GUI 123
8.6 Generating Reports 124
8.7 For More Information 124
PartIV.Resource 127
Management 127
General System Resource 129
9.1.2 Installation Scope 130
9.1.3 Default Runlevel 130
9.2 Disabling Unnecessary 131
Services 131
9.3.1 File Systems 132
Kernel Control Groups 135
10.2 Scenario 136
Disk I/O 137
Network I/O 137
10.3 Control Group Subsystems 138
10.4 Using Controller Groups 141
10.4.3 Example: Cpusets 142
10.4.4 Example: cgroups 143
10.5 For More Information 144
Power Management 147
11.1.4 Turbo Features 150
11.2 The Linux Kernel CPUfreq 151
Infrastructure 151
11.3 Viewing, Monitoring and 153
Tuning Power-related Settings 153
Statistics with cpupower 157
11.4 Special Tuning Options 160
11.5 Creating and Using Power 163
Management Profiles 163
11.6 Troubleshooting 164
11.7 For More Information 165
PartV.Kernel Tuning 167
Installing Multiple Kernel 169
Versions 169
12.1 Enabling and Configuring 170
Multiversion Support 170
Kernel Versions with YaST 171
Kernel Versions with zypper 172
Tuning I/O Performance 175
13.2 Available I/O Elevators 176
13.2.2 NOOP 177
13.2.3 DEADLINE 177
13.3 I/O Barrier Tuning 178
Tuning the Task Scheduler 179
14.2 Process Classification 180
14.3 O(1) Scheduler 181
14.4.1 How CFS Works 183
14.4.2 Grouping Processes 183
14.4.4 Terminology 184
Scheduler Statistics 189
14.5 For More Information 190
Tuning the Memory 193
Management Subsystem 193
15.1 Memory Usage 194
15.1.4 Buffer Heads 195
15.1.5 Writeback 195
15.1.6 Readahead 195
15.1.7 VFS caches 195
15.2 Reducing Memory Usage 196
Tunable Parameters 197
15.3.2 Writeback Parameters 198
15.3.3 Readahead parameters 199
15.3.4 Further VM Parameters 199
15.5 Monitoring VM Behavior 200
Tuning the Network 201
/proc/sys/net/ipv6 202
/proc/sys/net/core 202
/proc/sys/net/ipv4 202
16.3 Netfilter 203
16.4 For More Information 204
PartVI.Handling 205
System Dumps 205
Tracing Tools 207
Valgrind 212
17.3.3 General Information 213
17.3.4 Default Options 214
17.3.5 How Valgrind Works 214
17.3.6 Messages 215
17.3.7 Error Messages 216
17.4 For More Information 217
18.1 Introduction 219
18.2 Required Packages 220
18.3 kexec Internals 220
18.4 Basic kexec Usage 221
Routine Reboots 222
/sbin/mkinitrd -D vlan0 223
/sbin/mkinitrd -I eth0 223
18.6.2 YaST Configuration 226
18.7 Analyzing the Crash Dump 227
18.7.1 Kernel Binary Formats 228
18.8 Advanced kdump 231
Configuration 231
18.9 For More Information 232
GNU Licenses 235
2. VERBATIM COPYING 236
3. COPYING IN QUANTITY 236
4. MODIFICATIONS 236
5. COMBINING DOCUMENTS 237
GNU Licenses 225 239

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Red Hat ENTERPRISE LINUX 5.4 - SYSTEMTAP BEGINNERS GUIDE Informazioni Techniche Pagina 15

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