Further CPU Experimental Changes

server/services/collectors/bcache.js

@@ -6,6 +6,7 @@ import fs from 'fs'
 import path from 'path'
 import { CollectorPlugin } from './plugin.js'
 import { registerChart } from '../../../shared/metrics.js'
+import { readFileBuf } from '../../utils/fd-cache.js'
 
 export function isBcacheEnabled() {
   const v = process.env.PEARDATA_BCACHE
@@ -15,11 +16,8 @@ export function isBcacheEnabled() {
 }
 
 function readNum(p) {
-  try {
-    return Number(fs.readFileSync(p, 'utf8').trim()) || 0
-  } catch {
-    return 0
-  }
+  const raw = readFileBuf(p)
+  return raw ? Number(raw.trim()) || 0 : 0
 }
 
 export class BcacheCollector extends CollectorPlugin {