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sent 2025-05-20 22:12:31 -07:00
parent d3875151f8
commit ecf721aac1
1 changed files with 22 additions and 17 deletions
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39
others/scaler.mjs
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@ -1,31 +1,36 @@
import { LRUCache } from "lru-cache";
import { LRUCache } from 'lru-cache';
let maxKeys = 10000;
let maxKeys = 10_000;
let cache = makeCache(maxKeys);
const cache = new LRUCache({
max: maxKeys,
ttl: 4 * 24 * 60 * 60 * 1000,
allowStale: false,
updateAgeOnGet: false,
updateAgeOnHas: false,
});
function makeCache(maxEntries) {
return new LRUCache({
maxSize: maxEntries,
ttl: 4 * 24 * 60 * 60 * 1_000,
allowStale: false,
updateAgeOnGet: false,
updateAgeOnHas: false,
});
}
function scaleCache() {
const mem = process.memoryUsage();
const freeHeap = mem.heapTotal - mem.heapUsed;
const ratio = freeHeap / mem.heapTotal;
const { heapUsed, heapTotal } = process.memoryUsage();
const freeHeapRatio = (heapTotal - heapUsed) / heapTotal;
const newMax = ratio > 0.5 ? 20000 : ratio < 0.2 ? 5000 : 10000;
const newMax = freeHeapRatio > 0.5
? 20_000
: freeHeapRatio < 0.2
? 5_000
: 10_000;
if (newMax !== maxKeys) {
maxKeys = newMax;
cache.max = maxKeys;
console.log(`[SCALER] freeHeap ${(freeHeap / 1e6).toFixed(1)}MB → maxKeys: ${maxKeys}`);
cache = makeCache(maxKeys);
console.log(`[SCALER] freeHeap ${( (heapTotal - heapUsed)/1e6 ).toFixed(1)}MB → maxKeys: ${maxKeys}`);
}
}
setInterval(scaleCache, 60_000);
scaleCache();
export default cache;
export { cache };