code-cache-segments SKILL.md skillA
code-cache-segments from robsonkades/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add robsonkades/agent-skills/code-cache-segments@git:20261016.c769bd8Pins git:20261016.c769bd8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- robsonkades/agent-skills
- Path
skills/code-cache-segments/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261016.c769bd8, committed Oct 16, 2026
- First version recorded
- Sep 6, 2026
- Size
- 12,784 bytes
- Repository stars
- 3
- License
- Apache-2.0
The JDK 17-25 segmented code cache, GC-driven unloading, fragmentation, segment sizing, and jcmd Compiler.codecache/CodeHeap_Analytics. Use when aggregate usage looks healthy but one CodeHeap is exhausted, compilation stops or restarts, GC logs show a CodeCache cause, startup rejects manual heap sizes, an OutOfMemoryError reports "Out of space in CodeCache", or a long-running service degrades while aggregate free space remains. Covers runtime-shape discovery so tools do not assume exactly…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Code Cache Segments ## Purpose On JDK 17-25, treat the normally segmented code cache as three independent allocators with separate ceilings. One `CodeHeap` can sit at 99.8% while the consolidated number reads 72%, and every tool that stops at the consolidated line reports a healthy system. Allocation fallback already exists in JDK 17: pressure in one heap can send tier-3 code into the heap normally used for non-profiled code. Separately, since JDK 20, GC-driven unloading has replaced the sweeper, and code-cache GC triggers use aggregate pressure rather than detecting an individual full heap. A code-cache-full compiler stop occurs when allocation cannot be satisfied after the applicable fallback. Do not hard-code a count of three into tooling: unsegmented and interpreter-only modes have fewer heaps, and later HotSpot builds can add heap kinds. Discover the runtime shape from `Compiler.codecache` and `jdk.CodeCacheConfiguration`. The second failure this prevents is the reflexive "double `ReservedCodeCacheSize`". With default sizing, extra capacity is shared between the nmethod heaps; it does not proportionally …
Read the whole file at its exact version.
How to install
mdr add robsonkades/agent-skills/code-cache-segments@sha256:8b33cb42add00400The line at the top of this page pins the label git:20261016.c769bd8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_r4rtz4nv5wbt26af)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 6, 2026 and Oct 16, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.c769bd8 latest | 2026-10-16 | c769bd8 | 12,784 B | A | view · diff |
| git:20260927.9ecadfd | 2026-09-27 | 9ecadfd | 12,589 B | A | view · diff |
| git:20260923.832673e | 2026-09-23 | 832673e | 11,244 B | A | view · diff |
| git:20260911.37b054b | 2026-09-11 | 37b054b | 11,011 B | A | view · diff |
| git:20260906.e6ad4bd | 2026-09-06 | e6ad4bd | 10,676 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12784 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
robsonkades/agent-skills · 3 stars · license Apache-2.0 · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_r4rtz4nv5wbt26af GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/code-cache-segments GET https://markdownregistry.com/api/v1/blob/8b33cb42add004008fd25b29a231ddc951c8a26fbbd114392d8a154c0879a0ed
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.