diff --git a/app/pages/system/CapacityUtilizationPage.tsx b/app/pages/system/CapacityUtilizationPage.tsx
index dbab91491..94dffbfeb 100644
--- a/app/pages/system/CapacityUtilizationPage.tsx
+++ b/app/pages/system/CapacityUtilizationPage.tsx
@@ -7,7 +7,7 @@
  */
 import { getLocalTimeZone, now } from '@internationalized/date'
 import { useIsFetching } from '@tanstack/react-query'
-import { memo, useMemo, useState } from 'react'
+import { useMemo, useState } from 'react'
 
 import type { SiloResultsPage } from '@oxide/api'
 import {
@@ -28,15 +28,14 @@ import {
   Table,
   Tabs,
 } from '@oxide/ui'
-import { bytesToGiB, bytesToTiB, camelCase } from '@oxide/util'
+import { bytesToGiB, bytesToTiB } from '@oxide/util'
 
 import { CapacityMetric, capacityQueryParams } from 'app/components/CapacityMetric'
 import { useIntervalPicker } from 'app/components/RefetchIntervalPicker'
 import { SystemMetric } from 'app/components/SystemMetric'
 import { useDateTimeRangePicker } from 'app/components/form'
 
-import type { SiloMetric } from './metrics-util'
-import { mergeSiloMetrics } from './metrics-util'
+import { tabularizeSiloMetrics } from './metrics-util'
 
 CapacityUtilizationPage.loader = async () => {
   await Promise.all([
@@ -189,54 +188,23 @@ const MetricsTab = ({
   )
 }
 
-const usageTableParams = {
-  startTime: new Date(0),
-  endTime: capacityQueryParams.endTime,
-  limit: 1,
-  order: 'descending' as const,
-}
-
-const UsageTab = memo(({ silos }: { silos: SiloResultsPage }) => {
-  const siloList = silos?.items.map((silo) => ({ name: silo.name, id: silo.id })) || []
-
-  const results = useApiQueries('systemMetric', [
-    ...siloList.map((silo) => ({
-      path: { metricName: 'virtual_disk_space_provisioned' as const },
-      query: { ...usageTableParams, silo: silo.name },
-    })),
-    ...siloList.map((silo) => ({
-      path: { metricName: 'ram_provisioned' as const },
-      query: { ...usageTableParams, silo: silo.name },
-    })),
-    ...siloList.map((silo) => ({
-      path: { metricName: 'cpus_provisioned' as const },
-      query: { ...usageTableParams, silo: silo.name },
-    })),
-  ])
+function UsageTab({ silos }: { silos: SiloResultsPage }) {
+  const results = useApiQueries(
+    'systemMetric',
+    silos.items.flatMap((silo) => {
+      const query = { ...capacityQueryParams, silo: silo.name }
+      return [
+        { path: { metricName: 'virtual_disk_space_provisioned' as const }, query },
+        { path: { metricName: 'ram_provisioned' as const }, query },
+        { path: { metricName: 'cpus_provisioned' as const }, query },
+      ]
+    })
+  )
 
   // TODO: loading state, this could take some time
   if (results.some((result) => result.isPending)) return null
 
-  const siloResults = results
-    .map((result) => {
-      if (result.data && result.data.params) {
-        const params = result.data.params
-
-        if (!params.query) {
-          return undefined
-        }
-
-        return {
-          siloName: params.query.silo,
-          metrics: {
-            [camelCase(params.path.metricName)]: result.data.items[0].datum.datum,
-          },
-        } as SiloMetric
-      }
-    })
-    .filter((item): item is SiloMetric => Boolean(item))
-
-  const mergedResults = mergeSiloMetrics(siloResults)
+  const mergedResults = tabularizeSiloMetrics(results)
 
   return (
     <Table className="w-full">
@@ -256,13 +224,13 @@ const UsageTab = memo(({ silos }: { silos: SiloResultsPage }) => {
         {mergedResults.map((result) => (
           <Table.Row key={result.siloName}>
             <Table.Cell width="25%">{result.siloName}</Table.Cell>
-            <Table.Cell width="25%">{result.metrics.cpusProvisioned}</Table.Cell>
+            <Table.Cell width="25%">{result.metrics.cpus_provisioned}</Table.Cell>
             <Table.Cell width="25%">
-              {bytesToTiB(result.metrics.virtualDiskSpaceProvisioned)}
+              {bytesToTiB(result.metrics.virtual_disk_space_provisioned)}
               <span className="ml-1 inline-block text-quaternary">TiB</span>
             </Table.Cell>
             <Table.Cell width="25%">
-              {bytesToGiB(result.metrics.ramProvisioned)}
+              {bytesToGiB(result.metrics.ram_provisioned)}
               <span className="ml-1 inline-block text-quaternary">GiB</span>
             </Table.Cell>
           </Table.Row>
@@ -270,4 +238,4 @@ const UsageTab = memo(({ silos }: { silos: SiloResultsPage }) => {
       </Table.Body>
     </Table>
   )
-})
+}
diff --git a/app/pages/system/metrics-util.spec.ts b/app/pages/system/metrics-util.spec.ts
index 8596dcf35..276654047 100644
--- a/app/pages/system/metrics-util.spec.ts
+++ b/app/pages/system/metrics-util.spec.ts
@@ -7,27 +7,59 @@
  */
 import { expect, test } from 'vitest'
 
-import { mergeSiloMetrics } from './metrics-util'
+import type { SystemMetricName } from '@oxide/api'
 
-test('mergeSiloMetrics', () => {
-  expect(mergeSiloMetrics([])).toEqual([])
-  expect(mergeSiloMetrics([{ siloName: 'a', metrics: { m1: 1 } }])).toEqual([
-    { siloName: 'a', metrics: { m1: 1 } },
-  ])
-  expect(
-    mergeSiloMetrics([
-      { siloName: 'a', metrics: { m1: 1 } },
-      { siloName: 'a', metrics: { m2: 2 } },
-    ])
-  ).toEqual([{ siloName: 'a', metrics: { m1: 1, m2: 2 } }])
+import type { MetricsResult } from './metrics-util'
+import { tabularizeSiloMetrics } from './metrics-util'
+
+function makeResult(
+  silo: string,
+  metricName: SystemMetricName,
+  value: number
+): MetricsResult {
+  return {
+    data: {
+      items: [
+        {
+          datum: { type: 'i64', datum: value },
+          timestamp: new Date(),
+        },
+      ],
+      params: { query: { silo }, path: { metricName } },
+    },
+  }
+}
+
+test('tabularizeSiloMetrics', () => {
+  expect(tabularizeSiloMetrics([])).toEqual([])
   expect(
-    mergeSiloMetrics([
-      { siloName: 'a', metrics: { m1: 1 } },
-      { siloName: 'a', metrics: { m2: 2 } },
-      { siloName: 'b', metrics: { m1: 3 } },
+    tabularizeSiloMetrics([
+      makeResult('a', 'virtual_disk_space_provisioned', 1),
+      makeResult('b', 'virtual_disk_space_provisioned', 2),
+      makeResult('a', 'cpus_provisioned', 3),
+      makeResult('b', 'cpus_provisioned', 4),
+      makeResult('a', 'ram_provisioned', 5),
+      makeResult('b', 'ram_provisioned', 6),
+      // here to make sure it gets ignored and doesn't break anything
+      // @ts-expect-error
+      { error: 'whoops' },
     ])
   ).toEqual([
-    { siloName: 'a', metrics: { m1: 1, m2: 2 } },
-    { siloName: 'b', metrics: { m1: 3 } },
+    {
+      siloName: 'a',
+      metrics: {
+        virtual_disk_space_provisioned: 1,
+        cpus_provisioned: 3,
+        ram_provisioned: 5,
+      },
+    },
+    {
+      siloName: 'b',
+      metrics: {
+        virtual_disk_space_provisioned: 2,
+        cpus_provisioned: 4,
+        ram_provisioned: 6,
+      },
+    },
   ])
 })
diff --git a/app/pages/system/metrics-util.ts b/app/pages/system/metrics-util.ts
index fedcd1aa4..941bd106c 100644
--- a/app/pages/system/metrics-util.ts
+++ b/app/pages/system/metrics-util.ts
@@ -5,16 +5,46 @@
  *
  * Copyright Oxide Computer Company
  */
+import type {
+  MeasurementResultsPage,
+  SystemMetricName,
+  SystemMetricPathParams,
+  SystemMetricQueryParams,
+} from '@oxide/api'
 import { groupBy } from '@oxide/util'
 
-export type SiloMetric = {
+export type MetricsResult = {
+  data?: MeasurementResultsPage & {
+    params: {
+      path: SystemMetricPathParams
+      query?: SystemMetricQueryParams
+    }
+  }
+}
+
+type SiloMetric = {
   siloName: string
-  metrics: Record<string, number>
+  metrics: Record<SystemMetricName, number>
 }
 
-export const mergeSiloMetrics = (results: SiloMetric[]): SiloMetric[] => {
-  return groupBy(results, (result) => result.siloName).map(([siloName, values]) => ({
-    siloName,
-    metrics: Object.assign({}, ...values.map((v) => v.metrics)),
-  }))
+/**
+ * Turn the big list of query results into something we can display in a table.
+ * See the tests for an example.
+ */
+export function tabularizeSiloMetrics(results: MetricsResult[]): SiloMetric[] {
+  const processed = results
+    // filter mostly to ensure we don't try to pull data off an error response
+    .filter((r) => r.data?.params.query?.silo)
+    .map((r) => {
+      const metricName = r.data!.params.path.metricName
+      const value = r.data!.items[0].datum.datum as number
+      return {
+        siloName: r.data!.params.query!.silo!,
+        metrics: { [metricName]: value },
+      }
+    })
+
+  return groupBy(processed, (r) => r.siloName).map(([siloName, results]) => {
+    return { siloName, metrics: Object.assign({}, ...results.map((r) => r.metrics)) }
+  })
 }