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DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

Description

@Dreamescaper

Describe the bug

I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

Expected Behavior

Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

Current Behavior

Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

Additional Information/Context

Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

image

Targeted .NET Platform

.NET 8

Operating System and version

AmazonLinux

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    , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all
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    DOTNET_GCHeapHardLimit is still needed with .NET 8 · Issue #1699 · aws/aws-lambda-dotnet · GitHub
    Skip to content

    DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

    Description

    @Dreamescaper

    Describe the bug

    I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

    Expected Behavior

    Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

    Current Behavior

    Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

    Additional Information/Context

    Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

    image

    Targeted .NET Platform

    .NET 8

    Operating System and version

    AmazonLinux

    Metadata

    Metadata

    Assignees

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

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      None yet

      Development

      No branches or pull requests

      Issue actions

      , 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' DOTNET_GCHeapHardLimit is still needed with .NET 8 · Issue #1699 · aws/aws-lambda-dotnet · GitHub
      Skip to content

      DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

      Description

      @Dreamescaper

      Describe the bug

      I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

      Expected Behavior

      Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

      Current Behavior

      Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

      Additional Information/Context

      Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

      image

      Targeted .NET Platform

      .NET 8

      Operating System and version

      AmazonLinux

      Metadata

      Metadata

      Assignees

      Type

      No type

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      No projects

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        No milestone

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        None yet

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        No branches or pull requests

        Issue actions

        , 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' DOTNET_GCHeapHardLimit is still needed with .NET 8 · Issue #1699 · aws/aws-lambda-dotnet · GitHub
        Skip to content

        DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

        Description

        @Dreamescaper

        Describe the bug

        I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

        Expected Behavior

        Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

        Current Behavior

        Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

        Additional Information/Context

        Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

        image

        Targeted .NET Platform

        .NET 8

        Operating System and version

        AmazonLinux

        Metadata

        Metadata

        Assignees

        Type

        No type

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        No projects

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          No milestone

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          , 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' DOTNET_GCHeapHardLimit is still needed with .NET 8 · Issue #1699 · aws/aws-lambda-dotnet · GitHub
          Skip to content

          DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

          Description

          @Dreamescaper

          Describe the bug

          I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

          Expected Behavior

          Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

          Current Behavior

          Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

          Additional Information/Context

          Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

          image

          Targeted .NET Platform

          .NET 8

          Operating System and version

          AmazonLinux

          Metadata

          Metadata

          Assignees

          Type

          No type

          Projects

          No projects

            Milestone

            No milestone

            Relationships

            None yet

            Development

            No branches or pull requests

            Issue actions

            , 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' DOTNET_GCHeapHardLimit is still needed with .NET 8 · Issue #1699 · aws/aws-lambda-dotnet · GitHub
            Skip to content

            DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

            Description

            @Dreamescaper

            Describe the bug

            I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

            Expected Behavior

            Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

            Current Behavior

            Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

            Additional Information/Context

            Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

            image

            Targeted .NET Platform

            .NET 8

            Operating System and version

            AmazonLinux

            Metadata

            Metadata

            Assignees

            Type

            No type

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            No projects

              Milestone

              No milestone

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              None yet

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              No branches or pull requests

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              , 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' DOTNET_GCHeapHardLimit is still needed with .NET 8 · Issue #1699 · aws/aws-lambda-dotnet · GitHub
              Skip to content

              DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

              Description

              @Dreamescaper

              Describe the bug

              I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

              Expected Behavior

              Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

              Current Behavior

              Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

              Additional Information/Context

              Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

              image

              Targeted .NET Platform

              .NET 8

              Operating System and version

              AmazonLinux

              Metadata

              Metadata

              Assignees

              Type

              No type

              Projects

              No projects

                Milestone

                No milestone

                Relationships

                None yet

                Development

                No branches or pull requests

                Issue actions

                , 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })(); DOTNET_GCHeapHardLimit is still needed with .NET 8 · Issue #1699 · aws/aws-lambda-dotnet · GitHub
                Skip to content

                DOTNET_GCHeapHardLimit is still needed with .NET 8 #1699

                Description

                @Dreamescaper

                Describe the bug

                I was investigating rare OutOfMemory issues with our lambdas. I've tried to re-add DOTNET_GCHeapHardLimit environment variable, which I've removed after an update to .NET 8. And it does seem to fix the issue, even though I was under the impression that it's not required anymore with .NET 8.

                Expected Behavior

                Lambdas shouldn't fail with OutOfMemory issues without any additional steps.

                Current Behavior

                Lambdas still fail with OutOfMemory exceptions, unless DOTNET_GCHeapHardLimit env var is set.

                Additional Information/Context

                Here's a plot of Memory Usage before and after DOTNET_GCHeapHardLimit variable was set. You can see that RAM usage doesn't get as close to 512MB after env var is added.

                image

                Targeted .NET Platform

                .NET 8

                Operating System and version

                AmazonLinux

                Metadata

                Metadata

                Assignees

                Type

                No type

                Projects

                No projects

                  Milestone

                  No milestone

                  Relationships

                  None yet

                  Development

                  No branches or pull requests

                  Issue actions