arangosh> db._query("FOR i IN 1..100 INSERT { _key: CONCAT('test', TO_STRING(i)) } INTO mycollection").getExtra();
{
"stats" : {
"writesExecuted" : 100,
"writesIgnored" : 0,
"scannedFull" : 0,
"scannedIndex" : 0,
"filtered" : 0
},
"warnings" : [ ]
}