diff --git a/Cargo.lock b/Cargo.lock
index f0d4e603be..0228377795 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11702,6 +11702,7 @@ dependencies = [
  "fs-err 3.1.0",
  "futures",
  "illumos-utils",
+ "itertools 0.14.0",
  "libc",
  "omicron-common",
  "omicron-test-utils",
diff --git a/sled-diagnostics/Cargo.toml b/sled-diagnostics/Cargo.toml
index 70ca27f157..0791a9afe4 100644
--- a/sled-diagnostics/Cargo.toml
+++ b/sled-diagnostics/Cargo.toml
@@ -13,6 +13,7 @@ cfg-if.workspace = true
 fs-err = { workspace = true, features = ["tokio"] }
 futures.workspace = true
 illumos-utils.workspace = true
+itertools.workspace = true
 libc.workspace = true
 omicron-workspace-hack.workspace = true
 once_cell.workspace = true
diff --git a/sled-diagnostics/src/lib.rs b/sled-diagnostics/src/lib.rs
index 133e176575..639ad9b2ed 100644
--- a/sled-diagnostics/src/lib.rs
+++ b/sled-diagnostics/src/lib.rs
@@ -6,6 +6,7 @@
 
 use std::sync::Arc;
 
+use itertools::Itertools;
 use slog::Logger;
 
 #[macro_use]
@@ -34,6 +35,9 @@ use queries::*;
 /// Max number of commands to run in parallel
 const MAX_PARALLELISM: usize = 50;
 
+/// Max number of pids to operate on when running ptool commands
+const PID_CHUNK_SIZE: usize = 15;
+
 struct MultipleCommands<T> {
     semaphore: Arc<Semaphore>,
     set: JoinSet<T>,
@@ -119,9 +123,9 @@ pub async fn pargs_oxide_processes(
     };
 
     let mut commands = MultipleCommands::new();
-    for pid in pids {
+    for pid_chunk in &pids.into_iter().chunks(PID_CHUNK_SIZE) {
         commands.add_command(execute_command_with_timeout(
-            pargs_process(pid),
+            pargs_processes(pid_chunk),
             DEFAULT_TIMEOUT,
         ));
     }
@@ -140,9 +144,9 @@ pub async fn pstack_oxide_processes(
     };
 
     let mut commands = MultipleCommands::new();
-    for pid in pids {
+    for pid_chunk in &pids.into_iter().chunks(PID_CHUNK_SIZE) {
         commands.add_command(execute_command_with_timeout(
-            pstack_process(pid),
+            pstack_processes(pid_chunk),
             DEFAULT_TIMEOUT,
         ));
     }
@@ -161,9 +165,9 @@ pub async fn pfiles_oxide_processes(
     };
 
     let mut commands = MultipleCommands::new();
-    for pid in pids {
+    for pid_chunk in &pids.into_iter().chunks(PID_CHUNK_SIZE) {
         commands.add_command(execute_command_with_timeout(
-            pfiles_process(pid),
+            pfiles_processes(pid_chunk),
             DEFAULT_TIMEOUT,
         ));
     }
diff --git a/sled-diagnostics/src/queries.rs b/sled-diagnostics/src/queries.rs
index c1452abbc4..311651293c 100644
--- a/sled-diagnostics/src/queries.rs
+++ b/sled-diagnostics/src/queries.rs
@@ -248,21 +248,21 @@ pub fn nvmeadm_list() -> Command {
     cmd
 }
 
-pub fn pargs_process(pid: i32) -> Command {
+pub fn pargs_processes(pids: impl Iterator<Item = i32>) -> Command {
     let mut cmd = std::process::Command::new(PFEXEC);
-    cmd.env_clear().arg(PARGS).arg("-ae").arg(pid.to_string());
+    cmd.env_clear().arg(PARGS).arg("-ae").args(pids.map(|p| p.to_string()));
     cmd
 }
 
-pub fn pstack_process(pid: i32) -> Command {
+pub fn pstack_processes(pids: impl Iterator<Item = i32>) -> Command {
     let mut cmd = std::process::Command::new(PFEXEC);
-    cmd.env_clear().arg(PSTACK).arg(pid.to_string());
+    cmd.env_clear().arg(PSTACK).args(pids.map(|p| p.to_string()));
     cmd
 }
 
-pub fn pfiles_process(pid: i32) -> Command {
+pub fn pfiles_processes(pids: impl Iterator<Item = i32>) -> Command {
     let mut cmd = std::process::Command::new(PFEXEC);
-    cmd.env_clear().arg(PFILES).arg(pid.to_string());
+    cmd.env_clear().arg(PFILES).args(pids.map(|p| p.to_string()));
     cmd
 }