count 查询慢

count { count: “user”, query: { monthstarnum: { $gt: 0 } } } planSummary: COUNT_SCAN { monthstarnum: 1.0 } ntoskip:0 keyUpdates:0 writeConflicts:0 numYields:489 reslen:62 locks:{ Global: { acquireCount: { r: 980 }, acquireWaitCount: { r: 75 }, timeAcquiringMicros: { r: 10139931 } }, Database: { acquireCount: { r: 490 } }, Collection: { acquireCount: { r: 490 } } } protocol:op_query 10176ms