d2542c9a62
Squash the current repository state back into one baseline commit while preserving the README reframing and repository contents. Constraint: User explicitly requested a single squashed commit with subject "asdf" Confidence: high Scope-risk: broad Reversibility: clean Directive: This commit intentionally rewrites published history; coordinate before future force-pushes Tested: git status clean; local history rewritten to one commit; force-pushed main to origin and instructkr Not-tested: Fresh clone verification after push
40 lines
1.3 KiB
TypeScript
40 lines
1.3 KiB
TypeScript
import { useState } from 'react'
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import { useInterval } from 'usehooks-ts'
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export type MemoryUsageStatus = 'normal' | 'high' | 'critical'
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export type MemoryUsageInfo = {
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heapUsed: number
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status: MemoryUsageStatus
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}
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const HIGH_MEMORY_THRESHOLD = 1.5 * 1024 * 1024 * 1024 // 1.5GB in bytes
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const CRITICAL_MEMORY_THRESHOLD = 2.5 * 1024 * 1024 * 1024 // 2.5GB in bytes
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/**
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* Hook to monitor Node.js process memory usage.
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* Polls every 10 seconds; returns null while status is 'normal'.
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*/
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export function useMemoryUsage(): MemoryUsageInfo | null {
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const [memoryUsage, setMemoryUsage] = useState<MemoryUsageInfo | null>(null)
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useInterval(() => {
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const heapUsed = process.memoryUsage().heapUsed
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const status: MemoryUsageStatus =
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heapUsed >= CRITICAL_MEMORY_THRESHOLD
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? 'critical'
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: heapUsed >= HIGH_MEMORY_THRESHOLD
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? 'high'
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: 'normal'
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setMemoryUsage(prev => {
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// Bail when status is 'normal' — nothing is shown, so heapUsed is
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// irrelevant and we avoid re-rendering the whole Notifications subtree
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// every 10 seconds for the 99%+ of users who never reach 1.5GB.
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if (status === 'normal') return prev === null ? prev : null
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return { heapUsed, status }
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})
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}, 10_000)
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return memoryUsage
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}
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