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chore: memory limit comment (#7914)

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* chore: memory limit comment

Signed-off-by: jeremyhi <fengjiachun@gmail.com>

* chore: by gemini comment

Signed-off-by: jeremyhi <fengjiachun@gmail.com>

---------

Signed-off-by: jeremyhi <fengjiachun@gmail.com>
This commit is contained in:
jeremyhi
2026-04-07 17:37:03 -07:00
committed by GitHub
parent 6c72dc8e57
commit 6e0f5c5042
4 changed files with 11 additions and 5 deletions
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4
config/config.md
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@@ -139,7 +139,7 @@
| `region_engine.mito.max_background_flushes` | Integer | Auto | Max number of running background flush jobs (default: 1/2 of cpu cores). |
| `region_engine.mito.max_background_compactions` | Integer | Auto | Max number of running background compaction jobs (default: 1/4 of cpu cores). |
| `region_engine.mito.max_background_purges` | Integer | Auto | Max number of running background purge jobs (default: number of cpu cores). |
| `region_engine.mito.experimental_compaction_memory_limit` | String | 0 | Memory budget for compaction tasks. Setting it to 0 or "unlimited" disables the limit. |
| `region_engine.mito.experimental_compaction_memory_limit` | String | 0 | Memory budget for compaction tasks.<br/>Supports absolute size (e.g., "2GiB", "512MB") or percentage of system memory (e.g., "50%").<br/>Setting it to 0 or "unlimited" disables the limit. |
| `region_engine.mito.experimental_compaction_on_exhausted` | String | wait | Behavior when compaction cannot acquire memory from the budget.<br/>Options: "wait" (default, 10s), "wait(<duration>)", "fail" |
| `region_engine.mito.auto_flush_interval` | String | `1h` | Interval to auto flush a region if it has not flushed yet. |
| `region_engine.mito.global_write_buffer_size` | String | Auto | Global write buffer size for all regions. If not set, it's default to 1/8 of OS memory with a max limitation of 1GB. |
@@ -531,7 +531,7 @@
| `region_engine.mito.max_background_flushes` | Integer | Auto | Max number of running background flush jobs (default: 1/2 of cpu cores). |
| `region_engine.mito.max_background_compactions` | Integer | Auto | Max number of running background compaction jobs (default: 1/4 of cpu cores). |
| `region_engine.mito.max_background_purges` | Integer | Auto | Max number of running background purge jobs (default: number of cpu cores). |
| `region_engine.mito.experimental_compaction_memory_limit` | String | 0 | Memory budget for compaction tasks. Setting it to 0 or "unlimited" disables the limit. |
| `region_engine.mito.experimental_compaction_memory_limit` | String | 0 | Memory budget for compaction tasks.<br/>Supports absolute size (e.g., "2GiB", "512MB") or percentage of system memory (e.g., "50%").<br/>Setting it to 0 or "unlimited" disables the limit. |
| `region_engine.mito.experimental_compaction_on_exhausted` | String | wait | Behavior when compaction cannot acquire memory from the budget.<br/>Options: "wait" (default, 10s), "wait(<duration>)", "fail" |
| `region_engine.mito.auto_flush_interval` | String | `1h` | Interval to auto flush a region if it has not flushed yet. |
| `region_engine.mito.global_write_buffer_size` | String | Auto | Global write buffer size for all regions. If not set, it's default to 1/8 of OS memory with a max limitation of 1GB. |

4
config/datanode.example.toml
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@@ -446,7 +446,9 @@ compress_manifest = false
## @toml2docs:none-default="Auto"
#+ max_background_purges = 8
## Memory budget for compaction tasks. Setting it to 0 or "unlimited" disables the limit.
## Memory budget for compaction tasks.
## Supports absolute size (e.g., "2GiB", "512MB") or percentage of system memory (e.g., "50%").
## Setting it to 0 or "unlimited" disables the limit.
## @toml2docs:none-default="0"
#+ experimental_compaction_memory_limit = "0"

4
config/standalone.example.toml
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@@ -538,7 +538,9 @@ compress_manifest = false
## @toml2docs:none-default="Auto"
#+ max_background_purges = 8
## Memory budget for compaction tasks. Setting it to 0 or "unlimited" disables the limit.
## Memory budget for compaction tasks.
## Supports absolute size (e.g., "2GiB", "512MB") or percentage of system memory (e.g., "50%").
## Setting it to 0 or "unlimited" disables the limit.
## @toml2docs:none-default="0"
#+ experimental_compaction_memory_limit = "0"

4
src/mito2/src/config.rs
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@@ -91,7 +91,9 @@ pub struct MitoConfig {
pub max_background_compactions: usize,
/// Max number of running background purge jobs (default: number of cpu cores).
pub max_background_purges: usize,
/// Memory budget for compaction tasks. Setting it to 0 or "unlimited" disables the limit.
/// Memory budget for compaction tasks.
/// Supports absolute size (e.g., "2GiB", "512MB") or percentage of system memory (e.g., "50%").
/// Setting it to 0 or "unlimited" disables the limit.
pub experimental_compaction_memory_limit: MemoryLimit,
/// Behavior when compaction cannot acquire memory from the budget.
pub experimental_compaction_on_exhausted: OnExhaustedPolicy,