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houseme
6c37e1cb2a
* refactor: replace `lazy_static` with `LazyLock` Replace `lazy_static` with `LazyLock`. Compile time may reduce a little. See https://github.com/rust-lang-nursery/lazy-static.rs/issues/214 * fmt * fix
63 lines
2.8 KiB
Rust
63 lines
2.8 KiB
Rust
// Copyright 2024 RustFS Team
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#![allow(dead_code)]
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/// Memory-related metric descriptors
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///
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/// This module provides a set of metric descriptors for system memory statistics.
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/// These descriptors are initialized lazily using `std::sync::LazyLock` to ensure
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/// they are only created when actually needed, improving performance and reducing
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/// startup overhead.
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use crate::metrics::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
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use std::sync::LazyLock;
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/// Total memory available on the node
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pub static MEM_TOTAL_MD: LazyLock<MetricDescriptor> =
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LazyLock::new(|| new_gauge_md(MetricName::MemTotal, "Total memory on the node", &[], subsystems::SYSTEM_MEMORY));
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/// Memory currently in use on the node
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pub static MEM_USED_MD: LazyLock<MetricDescriptor> =
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LazyLock::new(|| new_gauge_md(MetricName::MemUsed, "Used memory on the node", &[], subsystems::SYSTEM_MEMORY));
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/// Percentage of total memory currently in use
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pub static MEM_USED_PERC_MD: LazyLock<MetricDescriptor> = LazyLock::new(|| {
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new_gauge_md(
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MetricName::MemUsedPerc,
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"Used memory percentage on the node",
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&[],
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subsystems::SYSTEM_MEMORY,
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)
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});
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/// Memory not currently in use and available for allocation
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pub static MEM_FREE_MD: LazyLock<MetricDescriptor> =
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LazyLock::new(|| new_gauge_md(MetricName::MemFree, "Free memory on the node", &[], subsystems::SYSTEM_MEMORY));
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/// Memory used for file buffers by the kernel
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pub static MEM_BUFFERS_MD: LazyLock<MetricDescriptor> =
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LazyLock::new(|| new_gauge_md(MetricName::MemBuffers, "Buffers memory on the node", &[], subsystems::SYSTEM_MEMORY));
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/// Memory used for caching file data by the kernel
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pub static MEM_CACHE_MD: LazyLock<MetricDescriptor> =
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LazyLock::new(|| new_gauge_md(MetricName::MemCache, "Cache memory on the node", &[], subsystems::SYSTEM_MEMORY));
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/// Memory shared between multiple processes
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pub static MEM_SHARED_MD: LazyLock<MetricDescriptor> =
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LazyLock::new(|| new_gauge_md(MetricName::MemShared, "Shared memory on the node", &[], subsystems::SYSTEM_MEMORY));
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/// Estimate of memory available for new applications without swapping
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pub static MEM_AVAILABLE_MD: LazyLock<MetricDescriptor> =
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LazyLock::new(|| new_gauge_md(MetricName::MemAvailable, "Available memory on the node", &[], subsystems::SYSTEM_MEMORY));
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