diff --git a/README.adoc b/README.adoc
index 6bbd2b0c20d..c3e5731809d 100644
--- a/README.adoc
+++ b/README.adoc
@@ -81,8 +81,17 @@ NOTE: This section assumes you're already familiar with the prerequisites and en
 * Use `cargo check` when you just want to know if your code compiles.  It's _much_ faster than `cargo build` or `cargo nextest run`.
 * When using Cargo's check/build/test/clippy commands, you can use the `-p PACKAGE` flag to only operate on a specific package.  This often saves a lot of time for incremental builds.
 * When using Cargo's check/build/clippy commands, use `--all-targets` to make sure you're checking or building the test code, too.
+* Beware of rust-analyzer's memory usage, which can easily be over 12 GB per
+  process. If you spawn multiple instances of it for this codebase, whether by
+  using multiple instances of vim, multiple editors, or some combination of
+  editors and coding agents, it's easy to accidentally overwhelm your system.
+  Consider using something like https://codeberg.org/p2502/lspmux[lspmux] (or
+  https://github.com/sunshowers/lspmux-rust-analyzer[sunshowers/lspmux-rust-analyzer])
+  to prevent this from happening.
 * Use https://rust-analyzer.github.io/book/configuration#cargo.targetDir[`cargo.targetDir`] to give rust-analyzer a target directory other than `./target` so it doesn't block you from running commands in the terminal. This uses extra disk space.
 
+These are explained a bit more below, along with some common pitfalls.
+
 .How to set `cargo.targetDir` in various editors
 [%collapsible]
 ====
@@ -93,12 +102,43 @@ NOTE: This section assumes you're already familiar with the prerequisites and en
 [language-server.rust-analyzer.config]
 cargo.targetDir = true
 ----
+.Neovim (using rustaceanvim)
+[source, lua]
+----
+vim.g.rustaceanvim = {
+  server = {
+    default_settings = {
+      ['rust-analyzer'] = {
+        cargo = {
+          targetDir = true,
+        },
+      },
+    },
+  },
+}
+----
+.Neovim (using LazyVim): merge the following into custom.lua
+[source, lua]
+----
+  {
+    "mrcjkb/rustaceanvim",
+    opts = {
+      server = {
+        default_settings = {
+          ["rust-analyzer"] = {
+            cargo = {
+              targetDir = true,
+            },
+          },
+        },
+      },
+    },
+  },
+----
 
 ====
 
 
-These are explained a bit more below, along with some common pitfalls.
-
 Here's an example workflow.  Suppose you're working on some changes to the Nexus database model (`nexus-db-model` package, located at `nexus/db-model` from the root).  While you're actively writing and checking code, you might run:
 
 ```