Memory
The Memory category provides live memory usage, a breakdown by memory state, and VM statistics (page-ins, faults, purges, and more).
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.
| Field | Updates | What It Means |
|---|---|---|
| Total Memory | Live (about 1s) | Total physical memory available. |
| Available Memory | Live (about 1s) | Memory available for immediate use. |
| Active Memory | Live (about 1s) | Memory currently in use. |
| Inactive Memory | Live (about 1s) | Memory not currently in use. |
| Free Memory | Live (about 1s) | Memory available for use. |
| Compressed Memory | Live (about 1s) | Memory that has been compressed to save space. |
| Wired Memory | Live (about 1s) | Memory reserved and cannot be freed. |
| Other Memory | Live (about 1s) | Memory used by other processes. |
| Page Ins | Live (about 1s) | Number of memory page ins. |
| Page Outs | Live (about 1s) | Number of memory page outs. |
| Page Faults | Live (about 1s) | Number of memory page faults. |
| COW Faults | Live (about 1s) | Number of copy-on-write faults. |
| Purgeable Count | Live (about 1s) | Number of purgeable pages. |
| Purges | Live (about 1s) | Number of memory purges. |
| Zero Filled | Live (about 1s) | Number of zero filled pages. |
| Reactivated | Live (about 1s) | Number of reactivated pages. |
| Speculative Read | Live (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 Size | Live (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.
| Field | Updates | What It Means |
|---|---|---|
| Memory Type | Spec | Type of memory used. |
| Memory Size | Spec | Total memory size. |
| Memory Clock | Spec | Memory clock speed. |
| Virtual Memory Swap | Spec | Virtual memory swap capability. |
| Memory Speed | Spec | Memory speed. |
| Transfer Rate | Spec | Memory transfer rate. |
Notes
- Some fields may be unavailable depending on device model, iOS version, and permissions.