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Memory

The Memory category provides live memory usage, a breakdown by memory state, and VM statistics (page-ins, faults, purges, and more).

Memory: live usage breakdown and VM statistics.

Table Of Contents

Overview

For charts and a focused view, see Memory.

This category mixes live runtime readings (from iOS) with model-specific specs (from Lirum's built-in device database).

Field Reference

Live Fields

Live fields are fetched from iOS at the interval shown. Values can change as your device state changes.

FieldUpdatesWhat It Means
Total MemoryLive (about 1s)Total physical memory available.
Available MemoryLive (about 1s)Memory available for immediate use.
Active MemoryLive (about 1s)Memory currently in use.
Inactive MemoryLive (about 1s)Memory not currently in use.
Free MemoryLive (about 1s)Memory available for use.
Compressed MemoryLive (about 1s)Memory that has been compressed to save space.
Wired MemoryLive (about 1s)Memory reserved and cannot be freed.
Other MemoryLive (about 1s)Memory used by other processes.
Page InsLive (about 1s)Number of memory page ins.
Page OutsLive (about 1s)Number of memory page outs.
Page FaultsLive (about 1s)Number of memory page faults.
COW FaultsLive (about 1s)Number of copy-on-write faults.
Purgeable CountLive (about 1s)Number of purgeable pages.
PurgesLive (about 1s)Number of memory purges.
Zero FilledLive (about 1s)Number of zero filled pages.
ReactivatedLive (about 1s)Number of reactivated pages.
Speculative ReadLive (about 1s)Number of speculative reads.
Available Memory %%Live (about 1s)Percentage of memory available.
Wired Memory %%Live (about 1s)Percentage of wired memory.
Active Memory %%Live (about 1s)Percentage of active memory.
Inactive Memory %%Live (about 1s)Percentage of inactive memory.
Free Memory %%Live (about 1s)Percentage of free memory.
Compressed Memory %%Live (about 1s)Percentage of compressed memory.
Other Memory %%Live (about 1s)Percentage of other memory usage.
Page SizeLive (about 60s)System memory page size.

Spec Fields

Spec fields describe your device model. They come from Lirum's built-in device database and do not change at runtime.

FieldUpdatesWhat It Means
Memory TypeSpecType of memory used.
Memory SizeSpecTotal memory size.
Memory ClockSpecMemory clock speed.
Virtual Memory SwapSpecVirtual memory swap capability.
Memory SpeedSpecMemory speed.
Transfer RateSpecMemory transfer rate.

Notes

  • Some fields may be unavailable depending on device model, iOS version, and permissions.