index_object:stat()

Return statistics about actions taken that affect the index.

This is for use with the vinyl engine.

Some detail items in the output from index_object:stat() are:

• index_object:stat().latency — timings subdivided by percentages;
• index_object:stat().bytes — the number of bytes total;
• index_object:stat().disk.rows — the approximate number of tuples in each range;
• index_object:stat().disk.statement — counts of inserts|updates|upserts|deletes;
• index_object:stat().disk.compaction — counts of compactions and their amounts;
• index_object:stat().disk.dump — counts of dumps and their amounts;
• index_object:stat().disk.iterator.bloom — counts of bloom filter hits|misses;
• index_object:stat().disk.pages — the size in pages;
• index_object:stat().disk.last_level — size of data in the last LSM tree level;
• index_object:stat().cache.evict — number of evictions from the cache;
• index_object:stat().range_size — maximum number of bytes in a range;
• index_object:stat().dumps_per_compaction — average number of dumps required to trigger major compaction in any range of the LSM tree. Summary index statistics are also available via box.stat.vinyl().

Parameters:

• index_object (index_object) — an object

Returns

statistics

Return type

table