WT-2771 Add a statistic to track per-btree dirty cache usage. (#3207)

8 files changed, 105 insertions, 68 deletions

diff --git a/dist/stat_data.py b/dist/stat_data.py
index 022810d5c49..c481382dafc 100644
--- a/dist/stat_data.py
+++ b/dist/stat_data.py
@@ -477,6 +477,7 @@ dsrc_stats = [
     ##########################################
     # Cache and eviction statistics
     ##########################################
+    CacheStat('cache_bytes_dirty', 'tracked dirty bytes in the cache', 'no_clear,no_scale,size'),
     CacheStat('cache_bytes_inuse', 'bytes currently in the cache', 'no_clear,no_scale,size'),
     CacheStat('cache_bytes_read', 'bytes read into cache', 'size'),
     CacheStat('cache_bytes_write', 'bytes written from cache', 'size'),
diff --git a/src/btree/bt_stat.c b/src/btree/bt_stat.c
index 06428b87f6e..f4701a858d5 100644
--- a/src/btree/bt_stat.c
+++ b/src/btree/bt_stat.c
@@ -40,6 +40,8 @@ __wt_btree_stat_init(WT_SESSION_IMPL *session, WT_CURSOR_STAT *cst)
 	WT_STAT_SET(session, stats, btree_maxleafpage, btree->maxleafpage);
 	WT_STAT_SET(session, stats, btree_maxleafvalue, btree->maxleafvalue);
 
+	WT_STAT_SET(session, stats, cache_bytes_dirty,
+	    __wt_btree_dirty_inuse(session));
 	WT_STAT_SET(session, stats, cache_bytes_inuse,
 	    __wt_btree_bytes_inuse(session));
 
diff --git a/src/include/btree.h b/src/include/btree.h
index 595afc453c8..c89e3c36c20 100644
--- a/src/include/btree.h
+++ b/src/include/btree.h
@@ -131,6 +131,7 @@ struct __wt_btree {
 	uint64_t write_gen;		/* Write generation */
 
 	uint64_t    bytes_inmem;	/* Cache bytes in memory. */
+	uint64_t    bytes_dirty_intl;	/* Bytes in dirty internal pages. */
 	uint64_t    bytes_dirty_leaf;	/* Bytes in dirty leaf pages. */
 
 	WT_REF	   *evict_ref;		/* Eviction thread's location */
diff --git a/src/include/btree.i b/src/include/btree.i
index 4f69c258621..fba6ee8e38a 100644
--- a/src/include/btree.i
+++ b/src/include/btree.i
@@ -71,6 +71,23 @@ __wt_btree_bytes_inuse(WT_SESSION_IMPL *session)
 }
 
 /*
+ * __wt_btree_dirty_inuse --
+ *	Return the number of dirty bytes in use.
+ */
+static inline uint64_t
+__wt_btree_dirty_inuse(WT_SESSION_IMPL *session)
+{
+	WT_BTREE *btree;
+	WT_CACHE *cache;
+
+	btree = S2BT(session);
+	cache = S2C(session)->cache;
+
+	return (__wt_cache_bytes_plus_overhead(cache,
+	    btree->bytes_dirty_intl + btree->bytes_dirty_leaf));
+}
+
+/*
  * __wt_btree_dirty_leaf_inuse --
  *	Return the number of bytes in use by dirty leaf pages.
  */
@@ -105,11 +122,12 @@ __wt_cache_page_inmem_incr(WT_SESSION_IMPL *session, WT_PAGE *page, size_t size)
 	(void)__wt_atomic_addsize(&page->memory_footprint, size);
 	if (__wt_page_is_modified(page)) {
 		(void)__wt_atomic_addsize(&page->modify->bytes_dirty, size);
-		if (WT_PAGE_IS_INTERNAL(page))
+		if (WT_PAGE_IS_INTERNAL(page)) {
+			(void)__wt_atomic_add64(&btree->bytes_dirty_intl, size);
 			(void)__wt_atomic_add64(&cache->bytes_dirty_intl, size);
-		else if (!F_ISSET(btree, WT_BTREE_LSM_PRIMARY)) {
-			(void)__wt_atomic_add64(&cache->bytes_dirty_leaf, size);
+		} else if (!F_ISSET(btree, WT_BTREE_LSM_PRIMARY)) {
 			(void)__wt_atomic_add64(&btree->bytes_dirty_leaf, size);
+			(void)__wt_atomic_add64(&cache->bytes_dirty_leaf, size);
 		}
 	}
 	/* Track internal size in cache. */
@@ -238,10 +256,12 @@ __wt_cache_page_byte_dirty_decr(
 	if (i == 5)
 		return;
 
-	if (WT_PAGE_IS_INTERNAL(page))
+	if (WT_PAGE_IS_INTERNAL(page)) {
+		__wt_cache_decr_check_uint64(session, &btree->bytes_dirty_intl,
+		    decr, "WT_BTREE.bytes_dirty_intl");
 		__wt_cache_decr_check_uint64(session, &cache->bytes_dirty_intl,
 		    decr, "WT_CACHE.bytes_dirty_intl");
-	else if (!F_ISSET(btree, WT_BTREE_LSM_PRIMARY)) {
+	} else if (!F_ISSET(btree, WT_BTREE_LSM_PRIMARY)) {
 		__wt_cache_decr_check_uint64(session, &btree->bytes_dirty_leaf,
 		    decr, "WT_BTREE.bytes_dirty_leaf");
 		__wt_cache_decr_check_uint64(session, &cache->bytes_dirty_leaf,
@@ -297,6 +317,7 @@ __wt_cache_dirty_incr(WT_SESSION_IMPL *session, WT_PAGE *page)
 	 */
 	size = page->memory_footprint;
 	if (WT_PAGE_IS_INTERNAL(page)) {
+		(void)__wt_atomic_add64(&btree->bytes_dirty_intl, size);
 		(void)__wt_atomic_add64(&cache->bytes_dirty_intl, size);
 		(void)__wt_atomic_add64(&cache->pages_dirty_intl, 1);
 	} else {
@@ -392,17 +413,20 @@ __wt_cache_page_evict(WT_SESSION_IMPL *session, WT_PAGE *page)
 
 	/* Update the cache's dirty-byte count. */
 	if (modify != NULL && modify->bytes_dirty != 0) {
-		if (WT_PAGE_IS_INTERNAL(page))
+		if (WT_PAGE_IS_INTERNAL(page)) {
+			__wt_cache_decr_zero_uint64(session,
+			    &btree->bytes_dirty_intl,
+			    modify->bytes_dirty, "WT_BTREE.bytes_dirty_intl");
 			__wt_cache_decr_zero_uint64(session,
 			    &cache->bytes_dirty_intl,
 			    modify->bytes_dirty, "WT_CACHE.bytes_dirty_intl");
-		else if (!F_ISSET(btree, WT_BTREE_LSM_PRIMARY)) {
-			__wt_cache_decr_zero_uint64(session,
-			    &cache->bytes_dirty_leaf,
-			    modify->bytes_dirty, "WT_CACHE.bytes_dirty_leaf");
+		} else if (!F_ISSET(btree, WT_BTREE_LSM_PRIMARY)) {
 			__wt_cache_decr_zero_uint64(session,
 			    &btree->bytes_dirty_leaf,
 			    modify->bytes_dirty, "WT_BTREE.bytes_dirty_leaf");
+			__wt_cache_decr_zero_uint64(session,
+			    &cache->bytes_dirty_leaf,
+			    modify->bytes_dirty, "WT_CACHE.bytes_dirty_leaf");
 		}
 	}
 
diff --git a/src/include/stat.h b/src/include/stat.h
index 0daab83e166..3dcdf68b8d5 100644
--- a/src/include/stat.h
+++ b/src/include/stat.h
@@ -564,6 +564,7 @@ struct __wt_dsrc_stats {
 	int64_t cache_pages_requested;
 	int64_t cache_write;
 	int64_t cache_write_restore;
+	int64_t cache_bytes_dirty;
 	int64_t cache_eviction_clean;
 	int64_t cache_state_gen_avg_gap;
 	int64_t cache_state_avg_written_size;
diff --git a/src/include/wiredtiger.in b/src/include/wiredtiger.in
index a6deed7e14e..f9e232e0310 100644
--- a/src/include/wiredtiger.in
+++ b/src/include/wiredtiger.in
@@ -4978,181 +4978,183 @@ extern int wiredtiger_extension_terminate(WT_CONNECTION *connection);
 #define	WT_STAT_DSRC_CACHE_WRITE			2059
 /*! cache: pages written requiring in-memory restoration */
 #define	WT_STAT_DSRC_CACHE_WRITE_RESTORE		2060
+/*! cache: tracked dirty bytes in the cache */
+#define	WT_STAT_DSRC_CACHE_BYTES_DIRTY			2061
 /*! cache: unmodified pages evicted */
-#define	WT_STAT_DSRC_CACHE_EVICTION_CLEAN		2061
+#define	WT_STAT_DSRC_CACHE_EVICTION_CLEAN		2062
 /*!
  * cache_walk: Average difference between current eviction generation
  * when the page was last considered, only reported if cache_walk or all
  * statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_GEN_AVG_GAP		2062
+#define	WT_STAT_DSRC_CACHE_STATE_GEN_AVG_GAP		2063
 /*!
  * cache_walk: Average on-disk page image size seen, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_AVG_WRITTEN_SIZE	2063
+#define	WT_STAT_DSRC_CACHE_STATE_AVG_WRITTEN_SIZE	2064
 /*!
  * cache_walk: Clean pages currently in cache, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_PAGES_CLEAN		2064
+#define	WT_STAT_DSRC_CACHE_STATE_PAGES_CLEAN		2065
 /*!
  * cache_walk: Current eviction generation, only reported if cache_walk
  * or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_GEN_CURRENT		2065
+#define	WT_STAT_DSRC_CACHE_STATE_GEN_CURRENT		2066
 /*!
  * cache_walk: Dirty pages currently in cache, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_PAGES_DIRTY		2066
+#define	WT_STAT_DSRC_CACHE_STATE_PAGES_DIRTY		2067
 /*!
  * cache_walk: Entries in the root page, only reported if cache_walk or
  * all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_ROOT_ENTRIES		2067
+#define	WT_STAT_DSRC_CACHE_STATE_ROOT_ENTRIES		2068
 /*!
  * cache_walk: Internal pages currently in cache, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_PAGES_INTERNAL		2068
+#define	WT_STAT_DSRC_CACHE_STATE_PAGES_INTERNAL		2069
 /*!
  * cache_walk: Leaf pages currently in cache, only reported if cache_walk
  * or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_PAGES_LEAF		2069
+#define	WT_STAT_DSRC_CACHE_STATE_PAGES_LEAF		2070
 /*!
  * cache_walk: Maximum difference between current eviction generation
  * when the page was last considered, only reported if cache_walk or all
  * statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_GEN_MAX_GAP		2070
+#define	WT_STAT_DSRC_CACHE_STATE_GEN_MAX_GAP		2071
 /*!
  * cache_walk: Maximum page size seen, only reported if cache_walk or all
  * statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_MAX_PAGESIZE		2071
+#define	WT_STAT_DSRC_CACHE_STATE_MAX_PAGESIZE		2072
 /*!
  * cache_walk: Minimum on-disk page image size seen, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_MIN_WRITTEN_SIZE	2072
+#define	WT_STAT_DSRC_CACHE_STATE_MIN_WRITTEN_SIZE	2073
 /*!
  * cache_walk: On-disk page image sizes smaller than a single allocation
  * unit, only reported if cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_SMALLER_ALLOC_SIZE	2073
+#define	WT_STAT_DSRC_CACHE_STATE_SMALLER_ALLOC_SIZE	2074
 /*!
  * cache_walk: Pages created in memory and never written, only reported
  * if cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_MEMORY			2074
+#define	WT_STAT_DSRC_CACHE_STATE_MEMORY			2075
 /*!
  * cache_walk: Pages currently queued for eviction, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_QUEUED			2075
+#define	WT_STAT_DSRC_CACHE_STATE_QUEUED			2076
 /*!
  * cache_walk: Pages that could not be queued for eviction, only reported
  * if cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_NOT_QUEUEABLE		2076
+#define	WT_STAT_DSRC_CACHE_STATE_NOT_QUEUEABLE		2077
 /*!
  * cache_walk: Refs skipped during cache traversal, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_REFS_SKIPPED		2077
+#define	WT_STAT_DSRC_CACHE_STATE_REFS_SKIPPED		2078
 /*!
  * cache_walk: Size of the root page, only reported if cache_walk or all
  * statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_ROOT_SIZE		2078
+#define	WT_STAT_DSRC_CACHE_STATE_ROOT_SIZE		2079
 /*!
  * cache_walk: Total number of pages currently in cache, only reported if
  * cache_walk or all statistics are enabled
  */
-#define	WT_STAT_DSRC_CACHE_STATE_PAGES			2079
+#define	WT_STAT_DSRC_CACHE_STATE_PAGES			2080
 /*! compression: compressed pages read */
-#define	WT_STAT_DSRC_COMPRESS_READ			2080
+#define	WT_STAT_DSRC_COMPRESS_READ			2081
 /*! compression: compressed pages written */
-#define	WT_STAT_DSRC_COMPRESS_WRITE			2081
+#define	WT_STAT_DSRC_COMPRESS_WRITE			2082
 /*! compression: page written failed to compress */
-#define	WT_STAT_DSRC_COMPRESS_WRITE_FAIL		2082
+#define	WT_STAT_DSRC_COMPRESS_WRITE_FAIL		2083
 /*! compression: page written was too small to compress */
-#define	WT_STAT_DSRC_COMPRESS_WRITE_TOO_SMALL		2083
+#define	WT_STAT_DSRC_COMPRESS_WRITE_TOO_SMALL		2084
 /*! compression: raw compression call failed, additional data available */
-#define	WT_STAT_DSRC_COMPRESS_RAW_FAIL_TEMPORARY	2084
+#define	WT_STAT_DSRC_COMPRESS_RAW_FAIL_TEMPORARY	2085
 /*! compression: raw compression call failed, no additional data available */
-#define	WT_STAT_DSRC_COMPRESS_RAW_FAIL			2085
+#define	WT_STAT_DSRC_COMPRESS_RAW_FAIL			2086
 /*! compression: raw compression call succeeded */
-#define	WT_STAT_DSRC_COMPRESS_RAW_OK			2086
+#define	WT_STAT_DSRC_COMPRESS_RAW_OK			2087
 /*! cursor: bulk-loaded cursor-insert calls */
-#define	WT_STAT_DSRC_CURSOR_INSERT_BULK			2087
+#define	WT_STAT_DSRC_CURSOR_INSERT_BULK			2088
 /*! cursor: create calls */
-#define	WT_STAT_DSRC_CURSOR_CREATE			2088
+#define	WT_STAT_DSRC_CURSOR_CREATE			2089
 /*! cursor: cursor-insert key and value bytes inserted */
-#define	WT_STAT_DSRC_CURSOR_INSERT_BYTES		2089
+#define	WT_STAT_DSRC_CURSOR_INSERT_BYTES		2090
 /*! cursor: cursor-remove key bytes removed */
-#define	WT_STAT_DSRC_CURSOR_REMOVE_BYTES		2090
+#define	WT_STAT_DSRC_CURSOR_REMOVE_BYTES		2091
 /*! cursor: cursor-update value bytes updated */
-#define	WT_STAT_DSRC_CURSOR_UPDATE_BYTES		2091
+#define	WT_STAT_DSRC_CURSOR_UPDATE_BYTES		2092
 /*! cursor: insert calls */
-#define	WT_STAT_DSRC_CURSOR_INSERT			2092
+#define	WT_STAT_DSRC_CURSOR_INSERT			2093
 /*! cursor: next calls */
-#define	WT_STAT_DSRC_CURSOR_NEXT			2093
+#define	WT_STAT_DSRC_CURSOR_NEXT			2094
 /*! cursor: prev calls */
-#define	WT_STAT_DSRC_CURSOR_PREV			2094
+#define	WT_STAT_DSRC_CURSOR_PREV			2095
 /*! cursor: remove calls */
-#define	WT_STAT_DSRC_CURSOR_REMOVE			2095
+#define	WT_STAT_DSRC_CURSOR_REMOVE			2096
 /*! cursor: reset calls */
-#define	WT_STAT_DSRC_CURSOR_RESET			2096
+#define	WT_STAT_DSRC_CURSOR_RESET			2097
 /*! cursor: restarted searches */
-#define	WT_STAT_DSRC_CURSOR_RESTART			2097
+#define	WT_STAT_DSRC_CURSOR_RESTART			2098
 /*! cursor: search calls */
-#define	WT_STAT_DSRC_CURSOR_SEARCH			2098
+#define	WT_STAT_DSRC_CURSOR_SEARCH			2099
 /*! cursor: search near calls */
-#define	WT_STAT_DSRC_CURSOR_SEARCH_NEAR			2099
+#define	WT_STAT_DSRC_CURSOR_SEARCH_NEAR			2100
 /*! cursor: truncate calls */
-#define	WT_STAT_DSRC_CURSOR_TRUNCATE			2100
+#define	WT_STAT_DSRC_CURSOR_TRUNCATE			2101
 /*! cursor: update calls */
-#define	WT_STAT_DSRC_CURSOR_UPDATE			2101
+#define	WT_STAT_DSRC_CURSOR_UPDATE			2102
 /*! reconciliation: dictionary matches */
-#define	WT_STAT_DSRC_REC_DICTIONARY			2102
+#define	WT_STAT_DSRC_REC_DICTIONARY			2103
 /*! reconciliation: fast-path pages deleted */
-#define	WT_STAT_DSRC_REC_PAGE_DELETE_FAST		2103
+#define	WT_STAT_DSRC_REC_PAGE_DELETE_FAST		2104
 /*!
  * reconciliation: internal page key bytes discarded using suffix
  * compression
  */
-#define	WT_STAT_DSRC_REC_SUFFIX_COMPRESSION		2104
+#define	WT_STAT_DSRC_REC_SUFFIX_COMPRESSION		2105
 /*! reconciliation: internal page multi-block writes */
-#define	WT_STAT_DSRC_REC_MULTIBLOCK_INTERNAL		2105
+#define	WT_STAT_DSRC_REC_MULTIBLOCK_INTERNAL		2106
 /*! reconciliation: internal-page overflow keys */
-#define	WT_STAT_DSRC_REC_OVERFLOW_KEY_INTERNAL		2106
+#define	WT_STAT_DSRC_REC_OVERFLOW_KEY_INTERNAL		2107
 /*! reconciliation: leaf page key bytes discarded using prefix compression */
-#define	WT_STAT_DSRC_REC_PREFIX_COMPRESSION		2107
+#define	WT_STAT_DSRC_REC_PREFIX_COMPRESSION		2108
 /*! reconciliation: leaf page multi-block writes */
-#define	WT_STAT_DSRC_REC_MULTIBLOCK_LEAF		2108
+#define	WT_STAT_DSRC_REC_MULTIBLOCK_LEAF		2109
 /*! reconciliation: leaf-page overflow keys */
-#define	WT_STAT_DSRC_REC_OVERFLOW_KEY_LEAF		2109
+#define	WT_STAT_DSRC_REC_OVERFLOW_KEY_LEAF		2110
 /*! reconciliation: maximum blocks required for a page */
-#define	WT_STAT_DSRC_REC_MULTIBLOCK_MAX			2110
+#define	WT_STAT_DSRC_REC_MULTIBLOCK_MAX			2111
 /*! reconciliation: overflow values written */
-#define	WT_STAT_DSRC_REC_OVERFLOW_VALUE			2111
+#define	WT_STAT_DSRC_REC_OVERFLOW_VALUE			2112
 /*! reconciliation: page checksum matches */
-#define	WT_STAT_DSRC_REC_PAGE_MATCH			2112
+#define	WT_STAT_DSRC_REC_PAGE_MATCH			2113
 /*! reconciliation: page reconciliation calls */
-#define	WT_STAT_DSRC_REC_PAGES				2113
+#define	WT_STAT_DSRC_REC_PAGES				2114
 /*! reconciliation: page reconciliation calls for eviction */
-#define	WT_STAT_DSRC_REC_PAGES_EVICTION			2114
+#define	WT_STAT_DSRC_REC_PAGES_EVICTION			2115
 /*! reconciliation: pages deleted */
-#define	WT_STAT_DSRC_REC_PAGE_DELETE			2115
+#define	WT_STAT_DSRC_REC_PAGE_DELETE			2116
 /*! session: object compaction */
-#define	WT_STAT_DSRC_SESSION_COMPACT			2116
+#define	WT_STAT_DSRC_SESSION_COMPACT			2117
 /*! session: open cursor count */
-#define	WT_STAT_DSRC_SESSION_CURSOR_OPEN		2117
+#define	WT_STAT_DSRC_SESSION_CURSOR_OPEN		2118
 /*! transaction: update conflicts */
-#define	WT_STAT_DSRC_TXN_UPDATE_CONFLICT		2118
+#define	WT_STAT_DSRC_TXN_UPDATE_CONFLICT		2119
 
 /*!
  * @}
diff --git a/src/support/stat.c b/src/support/stat.c
index a9c0b24ef29..66710473ab9 100644
--- a/src/support/stat.c
+++ b/src/support/stat.c
@@ -64,6 +64,7 @@ static const char * const __stats_dsrc_desc[] = {
 	"cache: pages requested from the cache",
 	"cache: pages written from cache",
 	"cache: pages written requiring in-memory restoration",
+	"cache: tracked dirty bytes in the cache",
 	"cache: unmodified pages evicted",
 	"cache_walk: Average difference between current eviction generation when the page was last considered",
 	"cache_walk: Average on-disk page image size seen",
@@ -225,6 +226,7 @@ __wt_stat_dsrc_clear_single(WT_DSRC_STATS *stats)
 	stats->cache_pages_requested = 0;
 	stats->cache_write = 0;
 	stats->cache_write_restore = 0;
+		/* not clearing cache_bytes_dirty */
 	stats->cache_eviction_clean = 0;
 		/* not clearing cache_state_gen_avg_gap */
 		/* not clearing cache_state_avg_written_size */
@@ -372,6 +374,7 @@ __wt_stat_dsrc_aggregate_single(
 	to->cache_pages_requested += from->cache_pages_requested;
 	to->cache_write += from->cache_write;
 	to->cache_write_restore += from->cache_write_restore;
+	to->cache_bytes_dirty += from->cache_bytes_dirty;
 	to->cache_eviction_clean += from->cache_eviction_clean;
 	to->cache_state_gen_avg_gap += from->cache_state_gen_avg_gap;
 	to->cache_state_avg_written_size +=
@@ -535,6 +538,7 @@ __wt_stat_dsrc_aggregate(
 	    WT_STAT_READ(from, cache_pages_requested);
 	to->cache_write += WT_STAT_READ(from, cache_write);
 	to->cache_write_restore += WT_STAT_READ(from, cache_write_restore);
+	to->cache_bytes_dirty += WT_STAT_READ(from, cache_bytes_dirty);
 	to->cache_eviction_clean += WT_STAT_READ(from, cache_eviction_clean);
 	to->cache_state_gen_avg_gap +=
 	    WT_STAT_READ(from, cache_state_gen_avg_gap);
diff --git a/tools/wtstats/stat_data.py b/tools/wtstats/stat_data.py
index d925dd67b80..5d385cda705 100644
--- a/tools/wtstats/stat_data.py
+++ b/tools/wtstats/stat_data.py
@@ -94,6 +94,7 @@ no_scale_per_second_list = [
     'btree: row-store leaf pages',
     'cache: bytes currently in the cache',
     'cache: overflow values cached in memory',
+    'cache: tracked dirty bytes in the cache',
     'cache_walk: Average difference between current eviction generation when the page was last considered',
     'cache_walk: Average on-disk page image size seen',
     'cache_walk: Clean pages currently in cache',
@@ -186,6 +187,7 @@ no_clear_list = [
     'transaction: transaction range of IDs currently pinned by named snapshots',
     'btree: btree checkpoint generation',
     'cache: bytes currently in the cache',
+    'cache: tracked dirty bytes in the cache',
     'cache_walk: Average difference between current eviction generation when the page was last considered',
     'cache_walk: Average on-disk page image size seen',
     'cache_walk: Clean pages currently in cache',