Red Hat NETSCAPE MANAGEMENT SYSTEM 4.5 Instrukcja Użytkownika Strona 249
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Sizing Memory on the Server
These guidelines are intended to help system administrators determine an
appropriate amount of hardware memory for running a virtual machine workload on
ESX Server 1.5. Since the characteristics of your particular workload also influence
memory needs, you should follow up with testing to confirm that memory sizes
computed according to these guidelines achieve the desired results.
ESX Server uses a small amount of memory for its own virtualization layer, additional
memory for the console operating system and all remaining memory for running
virtual machines. The sections below explain each of these uses and provide a
quantitative sizing example.
Server Memory
ESX Server 1.5 uses approximately 24MB of system memory for its own virtualization
layer. This memory is allocated automatically when the ESX Server is loaded and is not
configurable.
Console Operating System Memory
The recommended amount of memory to configure for the console operating system
varies between 128MB and 512MB, depending on the number of virtual machines
you plan to run concurrently on the server:
• 128MB for <= 4 virtual machines
• 192MB for <= 8 virtual machines
• 272MB for <= 16 virtual machines
• 384MB for <= 32 virtual machines
• 512MB for > 32 virtual machines
Virtual Machine Memory Pool
The remaining pool of system memory is used for running virtual machines. ESX
Server manages the allocation of this memory to virtual machines automatically
based on administrative parameters and system load. ESX Server also attempts to
keep some memory free at all times in order to handle dynamic allocation requests
efficiently. ESX Server sets this level at approximately 6 percent of the memory
available for running virtual machines.
- VMware ESX Server 1
- VMware, Inc 2
- 3145 Porter Drive 2
- Palo Alto, CA 94304 2
- Table of Contents 3
- Welcome to VMware ESX Server 13
- What’s New in Version 1.5 15
- System Requirements 17
- Legacy Devices 21
- Technical Support Resources 22
- Installing, Configuring and 25
- Upgrading ESX Server 25
- ESX Server 26
- Before You Begin 28
- Installing VMware ESX Server 28
- Your Server 33
- 7. Click Perform Action 54
- GSX Server Virtual Machines 71
- Preparing to Use the Remote 79
- Management Software 79
- Linux – RPM Installer 81
- Linux – Tar Installer 81
- Remote Console on page 114 82
- Workstation 84
- Using the VMware Management 94
- Interface 94
- Management Interface 99
- Running VMware ESX Server 105
- Management Interface window 105
- Using Disk Modes 108
- Monitoring System Status 109
- Using the Remote Console 114
- VMware Tools Settings 117
- Cutting, Copying and Pasting 119
- Using SNMP with ESX Server 125
- Configuring SNMP Security 132
- Name Data type Description 139
- Backing Up Virtual Machines 140
- Operating Systems 144
- Guest Operating System 147
- Guest Operating Systems 149
- To enable expert mode, 154
- To enable expert mode, … 156
- Service 167
- Console Operating System and 169
- VMkernel 169
- Operating System 171
- The VMkernel Loader 173
- VMkernel Device Modules 174
- Machines 179
- Configuring Virtual Machines 181
- Using VMkernel Devices 182
- Modifying the SMBIOS UUID 187
- Enabling Repeatable Resumes 191
- Authenticating Users 193
- Default Permissions 194
- Using vmkfstools 199
- Naming VMFS File Systems 205
- Determining SCSI Target IDs 208
- Sharing the SCSI Bus 210
- Using Storage Area Networks 212
- Networking 215
- Promiscuous Mode 222
- Sharing Network Adapters and 224
- Virtual Networks 224
- Performance Tuning for Heavy 228
- Network Loads 228
- Resource Management 231
- CPU Resource Management 234
- Multiprocessor Systems 235
- Memory Resource Management 239
- Admission Control 240
- Dynamic Allocation 240
- Memory Reclamation 241
- Memory Sharing 242
- Sizing Memory on the Server 249
- Virtual Machine Memory 250
- Memory Overcommitment 251
- More Information 252
- Network Bandwidth Management 253
- Disk Bandwidth Management 257
- Configuration File Options 258
- Glossary 261
- Appendix A: I/O Adapter 265
- Compatibility Guide 265
- Linux Driver Compatibility 267
- VMware Certification 267
- Adaptec SCSI Adapters 268
- Emulex Fibre Channel Adapters 272
- QLogic Fibre Channel Adapters 272
- Compaq RAID Controllers 272
- Mylex DAC960 RAID Controllers 273
- Intel Gigabit Ethernet NICs 277
- The OpenSSL Toolkit License 280
- License Issues 280
- Original SSLeay License 281
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