This integer holds the low-order 32 bits of a 64-bit counter of the total number of read cache misses for this cache volume (summing do-load, loading, and skip categories), paired with the high-order cpqDaLogDrvCacheVolAccelNoOfReadMissTotalH value, and returns -1 if not applicable. An admin uses this aggregate figure alongside read hits to compute an overall read cache effectiveness ratio for the volume. For example, comparing cpqDaLogDrvCacheVolAccelNoOfReadMissTotal against read hits over time lets the admin judge whether increasing cache volume size would meaningfully improve read performance.