diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ac745a0c..48b28cf58 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - Fixed `xplatform.loadFileUTF8` when trying to open nonexistent file (#454)
 - Bugfix: fix an incorrect check in the recovery router code which might lead to
   the state cell-pool being released prematurely (#446)
+- Allocating SLH for http server with configurable value 'httpRequestHeapMaxBlocks' in yaml (#447).
 
 ## `2.16.0`
 - No yaml value converted to null (#442)
diff --git a/c/httpserver.c b/c/httpserver.c
index d94875de0..c3cf7d9c5 100644
--- a/c/httpserver.c
+++ b/c/httpserver.c
@@ -1564,6 +1564,7 @@ HttpServer *makeHttpServerInner(STCBase *base,
   memcpy(&server->config->sessionTokenKey[0], &sessionTokenKey,
          sizeof (sessionTokenKey));
   server->config->authTokenType = SERVICE_AUTH_TOKEN_TYPE_LEGACY;
+  server->config->httpRequestHeapMaxBlocks = HTTP_REQUEST_HEAP_DEFAULT_BLOCKS;
 
   return server;
 }
@@ -1656,6 +1657,8 @@ static HttpServer *makeSecureHttpServerInner(STCBase *base, int port,
   int64 now = getFineGrainedTime();
   server->config->sessionTokenKeySize = sizeof (now);
   memcpy(&server->config->sessionTokenKey[0], &now, sizeof (now));
+  server->config->httpRequestHeapMaxBlocks = HTTP_REQUEST_HEAP_DEFAULT_BLOCKS;
+
   return server;
 }
 #endif
@@ -5821,7 +5824,9 @@ static int httpHandleTCP(STCBase *base,
         }
       }
 #endif // USE_ZOWE_TLS
-      ShortLivedHeap *slh = makeShortLivedHeap(READ_BUFFER_SIZE,100);
+      HttpServer *server = (HttpServer*) module->data;
+      unsigned int maxBlocks = server->config->httpRequestHeapMaxBlocks;
+      ShortLivedHeap *slh = makeShortLivedHeap(READ_BUFFER_SIZE, maxBlocks);
   #ifndef __ZOWE_OS_WINDOWS
       int writeBufferSize = 0x40000;
       setSocketWriteBufferSize(peerSocket,0x40000, &returnCode, &reasonCode);
diff --git a/h/httpserver.h b/h/httpserver.h
index 09f0d2de0..2cbbd6610 100644
--- a/h/httpserver.h
+++ b/h/httpserver.h
@@ -64,6 +64,10 @@
 
 #define HTTP_SERVER_PRIVILEGED_SERVER_PROPERTY  "zisServerName"
 
+#define HTTP_REQUEST_HEAP_DEFAULT_BLOCKS 1024
+#define HTTP_REQUEST_HEAP_MIN_BLOCKS 100
+#define HTTP_REQUEST_HEAP_MAX_BLOCKS 4096
+
 typedef struct BigBuffer_tag{
   ShortLivedHeap *slh;  /* can be null */
   char *data;
@@ -220,6 +224,7 @@ typedef struct HTTPServerConfig_tag {
   hashtable *userTimeouts;
   hashtable *groupTimeouts;
   int defaultTimeout;
+  unsigned int httpRequestHeapMaxBlocks;
   /* The config manager is optional, but zss and other servers need 
      a near-global way to get configuration data.
      */