diff --git a/src/plugins/github/graphql.js b/src/plugins/github/graphql.js
index 11a622a..4a06896 100644
--- a/src/plugins/github/graphql.js
+++ b/src/plugins/github/graphql.js
@@ -1,12 +1,27 @@
 // @flow
 
-import type {Body} from "../../graphql/queries";
+import type {Body, FragmentDefinition} from "../../graphql/queries";
 import {build} from "../../graphql/queries";
 
+/*
+ * GitHub enforces a hard limit of no more than 100 entities per page,
+ * in any single connection. GitHub also has a more global restriction
+ * on the worst-case number of nodes that could be requested by a query,
+ * which scales as the product of the page limits in any given sequence
+ * of nested connections. (For more information, see [1].) Therefore, we
+ * tune the page sizes of various entities to keep them comfortably
+ * within the global capacity.
+ *
+ * [1]: https://developer.github.com/v4/guides/resource-limitations/#node-limit
+ */
+const PAGE_SIZE_ISSUES = 100;
+const PAGE_SIZE_PRS = 100;
+const PAGE_SIZE_COMMENTS = 20;
+const PAGE_SIZE_REVIEWS = 10;
+const PAGE_SIZE_REVIEW_COMMENTS = 10;
+
 export function createQuery(): Body {
   const b = build;
-  const makePageInfo = () => b.field("pageInfo", {}, [b.field("hasNextPage")]);
-  const makeAuthor = () => b.field("author", {}, [b.fragmentSpread("whoami")]);
   const body: Body = [
     b.query(
       "FetchData",
@@ -16,66 +31,26 @@ export function createQuery(): Body {
           "repository",
           {owner: b.variable("repoOwner"), name: b.variable("repoName")},
           [
-            b.field("issues", {first: b.literal(100)}, [
-              makePageInfo(),
-              b.field("nodes", {}, [
-                b.field("id"),
-                b.field("title"),
-                b.field("body"),
-                b.field("number"),
-                makeAuthor(),
-                b.field("comments", {first: b.literal(20)}, [
-                  makePageInfo(),
-                  b.field("nodes", {}, [
-                    b.field("id"),
-                    makeAuthor(),
-                    b.field("body"),
-                    b.field("url"),
-                  ]),
-                ]),
-              ]),
+            b.field("issues", {first: b.literal(PAGE_SIZE_ISSUES)}, [
+              b.fragmentSpread("issues"),
             ]),
-            b.field("pullRequests", {first: b.literal(100)}, [
-              makePageInfo(),
-              b.field("nodes", {}, [
-                b.field("id"),
-                b.field("title"),
-                b.field("body"),
-                b.field("number"),
-                makeAuthor(),
-                b.field("comments", {first: b.literal(20)}, [
-                  makePageInfo(),
-                  b.field("nodes", {}, [
-                    b.field("id"),
-                    makeAuthor(),
-                    b.field("body"),
-                    b.field("url"),
-                  ]),
-                ]),
-                b.field("reviews", {first: b.literal(10)}, [
-                  makePageInfo(),
-                  b.field("nodes", {}, [
-                    b.field("id"),
-                    b.field("body"),
-                    makeAuthor(),
-                    b.field("state"),
-                    b.field("comments", {first: b.literal(10)}, [
-                      makePageInfo(),
-                      b.field("nodes", {}, [
-                        b.field("id"),
-                        b.field("body"),
-                        b.field("url"),
-                        makeAuthor(),
-                      ]),
-                    ]),
-                  ]),
-                ]),
-              ]),
+            b.field("pullRequests", {first: b.literal(PAGE_SIZE_PRS)}, [
+              b.fragmentSpread("prs"),
             ]),
           ]
         ),
       ]
     ),
+    ...createFragments(),
+  ];
+  return body;
+}
+
+function createFragments(): FragmentDefinition[] {
+  const b = build;
+  const makePageInfo = () => b.field("pageInfo", {}, [b.field("hasNextPage")]);
+  const makeAuthor = () => b.field("author", {}, [b.fragmentSpread("whoami")]);
+  return [
     b.fragment("whoami", "Actor", [
       b.field("__typename"),
       b.field("login"),
@@ -83,8 +58,67 @@ export function createQuery(): Body {
       b.inlineFragment("Organization", [b.field("id")]),
       b.inlineFragment("Bot", [b.field("id")]),
     ]),
+    b.fragment("issues", "IssueConnection", [
+      makePageInfo(),
+      b.field("nodes", {}, [
+        b.field("id"),
+        b.field("title"),
+        b.field("body"),
+        b.field("number"),
+        makeAuthor(),
+        b.field("comments", {first: b.literal(PAGE_SIZE_COMMENTS)}, [
+          b.fragmentSpread("comments"),
+        ]),
+      ]),
+    ]),
+    b.fragment("prs", "PullRequestConnection", [
+      makePageInfo(),
+      b.field("nodes", {}, [
+        b.field("id"),
+        b.field("title"),
+        b.field("body"),
+        b.field("number"),
+        makeAuthor(),
+        b.field("comments", {first: b.literal(PAGE_SIZE_COMMENTS)}, [
+          b.fragmentSpread("comments"),
+        ]),
+        b.field("reviews", {first: b.literal(PAGE_SIZE_REVIEWS)}, [
+          b.fragmentSpread("reviews"),
+        ]),
+      ]),
+    ]),
+    // (Note: issue comments and PR comments use the same connection type.)
+    b.fragment("comments", "IssueCommentConnection", [
+      makePageInfo(),
+      b.field("nodes", {}, [
+        b.field("id"),
+        makeAuthor(),
+        b.field("body"),
+        b.field("url"),
+      ]),
+    ]),
+    b.fragment("reviews", "PullRequestReviewConnection", [
+      makePageInfo(),
+      b.field("nodes", {}, [
+        b.field("id"),
+        b.field("body"),
+        makeAuthor(),
+        b.field("state"),
+        b.field("comments", {first: b.literal(PAGE_SIZE_REVIEW_COMMENTS)}, [
+          b.fragmentSpread("reviewComments"),
+        ]),
+      ]),
+    ]),
+    b.fragment("reviewComments", "PullRequestReviewCommentConnection", [
+      makePageInfo(),
+      b.field("nodes", {}, [
+        b.field("id"),
+        b.field("body"),
+        b.field("url"),
+        makeAuthor(),
+      ]),
+    ]),
   ];
-  return body;
 }
 
 export function createVariables(repoOwner: string, repoName: string) {