Import wiredtiger: f6b53220bf1ba63e95ff5fd12ab9dc56ec2b6e7a from branch mongodb-master

ref: 5b5f12635b..f6b53220bf
for: 7.2.0-rc0

WT-7929 Investigate a solution to avoid FTDC stalls during checkpoint

Author: ruby-oujo

src/third_party/wiredtiger/import.data

@@ -2,5 +2,5 @@
     "vendor": "wiredtiger",
     "github": "wiredtiger/wiredtiger.git",
     "branch": "mongodb-master",
-    "commit": "5b5f12635bdc5ce6f1c68bc58fbae13ec6a042fd"
+    "commit": "f6b53220bf1ba63e95ff5fd12ab9dc56ec2b6e7a"
 }

src/third_party/wiredtiger/src/schema/schema_open.c

@@ -261,10 +261,6 @@ __schema_open_index(
     const char *idxconf, *name, *tablename, *uri;
     bool match;
 
-    /* Check if we've already done the work. */
-    if (idxname == NULL && table->idx_complete)
-        return (0);
-
     cursor = NULL;
     idx = NULL;
     match = false;
@@ -388,6 +384,10 @@ __wt_schema_open_index(
 {
     WT_DECL_RET;
 
+    /* Check if we've already done the work. */
+    if (idxname == NULL && table->idx_complete)
+        return (0);
+
     WT_WITH_TABLE_WRITE_LOCK(session,
       WT_WITH_TXN_ISOLATION(session, WT_ISO_READ_UNCOMMITTED,
         ret = __schema_open_index(session, table, idxname, len, indexp)));

src/third_party/wiredtiger/src/schema/schema_stat.c

@@ -147,13 +147,27 @@ __wt_curstat_table_init(
 
     WT_ERR(__wt_scr_alloc(session, 0, &buf));
 
+    stats = &cst->u.dsrc_stats;
+
+    /*
+     * If gathering statistics for a simple table, retrieve the underlying file's statistics rather
+     * than going through the usual schema parsing flow. This avoids unnecessary overhead in the
+     * statistics gathering process.
+     *
+     * There will always be at least one column group for a table.
+     */
+    if (table->is_simple) {
+        WT_ERR(__wt_buf_fmt(session, buf, "statistics:%s", table->cgroups[0]->name));
+        WT_ERR(__wt_curstat_init(session, buf->data, NULL, cfg, cst));
+        goto done;
+    }
+
     /*
      * Process the column groups.
      *
      * Set the cursor to reference the data source statistics; we don't initialize it, instead we
      * copy (rather than aggregate), the first column's statistics, which has the same effect.
      */
-    stats = &cst->u.dsrc_stats;
     for (i = 0; i < WT_COLGROUPS(table); i++) {
         WT_ERR(__wt_buf_fmt(session, buf, "statistics:%s", table->cgroups[i]->name));
         WT_ERR(__wt_curstat_open(session, buf->data, NULL, cfg, &stat_cursor));
@@ -177,6 +191,7 @@ __wt_curstat_table_init(
 
     __wt_curstat_dsrc_final(cst);
 
+done:
 err:
     WT_TRET(__wt_schema_release_table(session, &table));