Fix "Available pages" to "Total pages"

Author: wuchong

fluss-common/src/main/java/com/alibaba/fluss/memory/LazyMemorySegmentPool.java

@@ -131,7 +131,7 @@ public List<MemorySegment> allocatePages(int requiredPages) throws IOException {
             throw new EOFException(
                     String.format(
                             "Allocation request cannot be satisfied because the number of maximum available pages is "
-                                    + "exceeded. Available pages: %d. Requested pages: %d",
+                                    + "exceeded. Total pages: %d. Requested pages: %d",
                             this.maxPages, requiredPages));
         }
 

fluss-common/src/test/java/com/alibaba/fluss/memory/LazyMemorySegmentPoolTest.java

@@ -190,7 +190,7 @@ void testCannotAllocateMorePagesThanAvailable() throws Exception {
 
         assertThatThrownBy(() -> pool.allocatePages(3))
                 .isInstanceOf(EOFException.class)
-                .hasMessageContaining("Available pages: 2. Requested pages: 3");
+                .hasMessageContaining("Total pages: 2. Requested pages: 3");
     }
 
     @Test
@@ -213,7 +213,7 @@ void testUnsatisfiableRequestDoesNotBlockAndThrowsException() {
         LazyMemorySegmentPool pool = buildLazyMemorySegmentSource(1, 1024, Long.MAX_VALUE, 1024);
         assertThatThrownBy(() -> pool.allocatePages(2))
                 .isInstanceOf(EOFException.class)
-                .hasMessageContaining("Available pages: 1. Requested pages: 2");
+                .hasMessageContaining("Total pages: 1. Requested pages: 2");
         assertThat(pool.queued()).isEqualTo(0);
         assertThat(pool.freePages()).isEqualTo(1);
     }