## Summary **No review yet** ## Minimized query ```sql BEGIN; CREATE TABLE album( aid INTEGER PRIMARY KEY, title TEXT UNIQUE NOT NULL); CREATE TABLE track( tid INTEGER PRIMARY KEY, aid INTEGER NOT NULL REFERENCES album, tn INTEGER NOT NULL, name TEXT, UNIQUE(aid, tn)); INSERT INTO album VALUES(1, '1-one'), (2, '2-two'), (3, '3-three'); INSERT INTO track VALUES (NULL, 1, 1, 'one-a'), (NULL, 2, 2, 'two-b'), (NULL, 3, 3, 'three-c'), (NULL, 1, 3, 'one-c'), (NULL, 2, 1, 'two-a'), (NULL, 3, 1, 'three-a'); COMMIT; SELECT name FROM album JOIN track USING (aid) ORDER BY title, tn; ALTER TABLE album RENAME COLUMN aid TO aid_r8401; ``` ## Actual output ```sql Memory Used: 62608 (max 62608) bytes Number of Outstanding Allocations: 122 (max 122) Number of Pcache Overflow Bytes: 4104 (max 4104) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4104 bytes Lookaside Slots Used: 35 (max 35) Successful lookaside attempts: 35 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 4904 bytes Page cache hits: 0 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 2528 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 2 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 2528 Bytes received by read(): 6887 Bytes sent to write(): 0 Read() system calls: 13 Write() system calls: 0 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 86824 (max 92728) bytes Number of Outstanding Allocations: 173 (max 182) Number of Pcache Overflow Bytes: 21288 (max 21288) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 32 (max 90) Successful lookaside attempts: 112 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 17936 bytes Page cache hits: 5 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 1224 bytes Statement Heap/Lookaside Usage: 4168 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 41 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 4168 Bytes received by read(): 7237 Bytes sent to write(): 1285 Read() system calls: 16 Write() system calls: 1 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 96328 (max 102320) bytes Number of Outstanding Allocations: 187 (max 200) Number of Pcache Overflow Bytes: 30008 (max 30008) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 32 (max 91) Successful lookaside attempts: 189 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 26624 bytes Page cache hits: 4 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 1904 bytes Statement Heap/Lookaside Usage: 4248 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 39 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 4248 Bytes received by read(): 7334 Bytes sent to write(): 2581 Read() system calls: 18 Write() system calls: 2 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 94480 (max 104288) bytes Number of Outstanding Allocations: 172 (max 200) Number of Pcache Overflow Bytes: 30008 (max 30008) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 50 (max 91) Successful lookaside attempts: 231 Lookaside failures due to size: 1 Lookaside failures due to OOM: 0 Pager Heap Usage: 26624 bytes Page cache hits: 2 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 1928 bytes Statement Heap/Lookaside Usage: 5624 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 72 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 5624 Bytes received by read(): 7431 Bytes sent to write(): 3878 Read() system calls: 20 Write() system calls: 3 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 94504 (max 104312) bytes Number of Outstanding Allocations: 173 (max 200) Number of Pcache Overflow Bytes: 30008 (max 30008) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 56 (max 103) Successful lookaside attempts: 306 Lookaside failures due to size: 2 Lookaside failures due to OOM: 0 Pager Heap Usage: 26624 bytes Page cache hits: 2 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 1952 bytes Statement Heap/Lookaside Usage: 13896 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 165 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 13896 Bytes received by read(): 7528 Bytes sent to write(): 5175 Read() system calls: 22 Write() system calls: 4 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 90520 (max 104312) bytes Number of Outstanding Allocations: 169 (max 200) Number of Pcache Overflow Bytes: 30008 (max 30008) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 35 (max 103) Successful lookaside attempts: 309 Lookaside failures due to size: 2 Lookaside failures due to OOM: 0 Pager Heap Usage: 26624 bytes Page cache hits: 0 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 1952 bytes Statement Heap/Lookaside Usage: 2528 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 2 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 2528 Bytes received by read(): 7625 Bytes sent to write(): 6476 Read() system calls: 24 Write() system calls: 5 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 one-a one-c two-a two-b three-a three-c Memory Used: 90568 (max 104312) bytes Number of Outstanding Allocations: 171 (max 200) Number of Pcache Overflow Bytes: 30008 (max 30008) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 46 (max 103) Successful lookaside attempts: 359 Lookaside failures due to size: 2 Lookaside failures due to OOM: 0 Pager Heap Usage: 26624 bytes Page cache hits: 4 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 2000 bytes Statement Heap/Lookaside Usage: 3680 bytes Fullscan Steps: 2 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 47 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 3680 Bytes received by read(): 7722 Bytes sent to write(): 7773 Read() system calls: 26 Write() system calls: 6 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 208568 (max 684680) bytes Number of Outstanding Allocations: 243 (max 349) Number of Pcache Overflow Bytes: 38216 (max 71048) bytes Largest Allocation: 87200 bytes Largest Pcache Allocation: 4360 bytes Lookaside Slots Used: 101 (max 123) Successful lookaside attempts: 707 Lookaside failures due to size: 5 Lookaside failures due to OOM: 268 Pager Heap Usage: 35840 bytes Page cache hits: 13 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Schema Heap Usage: 1920 bytes Statement Heap/Lookaside Usage: 52928 bytes Fullscan Steps: 12 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 257 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 52928 Bytes received by read(): 7819 Bytes sent to write(): 9111 Read() system calls: 29 Write() system calls: 7 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 ``` ## Expectation ```sql Memory Used: 63416 (max 63416) bytes Number of Outstanding Allocations: 132 (max 132) Number of Pcache Overflow Bytes: 4104 (max 4104) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4104 bytes Lookaside Slots Used: 51 (max 51) Successful lookaside attempts: 51 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 4904 bytes Page cache hits: 0 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 0 bytes Statement Heap/Lookaside Usage: 2528 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 3 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 2528 Bytes received by read(): 7663 Bytes sent to write(): 0 Read() system calls: 14 Write() system calls: 0 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 87264 (max 93072) bytes Number of Outstanding Allocations: 183 (max 192) Number of Pcache Overflow Bytes: 21304 (max 21304) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 48 (max 99) Successful lookaside attempts: 121 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 17960 bytes Page cache hits: 5 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 1072 bytes Statement Heap/Lookaside Usage: 3984 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 41 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 3984 Bytes received by read(): 7757 Bytes sent to write(): 1324 Read() system calls: 16 Write() system calls: 1 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 96736 (max 102624) bytes Number of Outstanding Allocations: 197 (max 210) Number of Pcache Overflow Bytes: 30040 (max 30040) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 48 (max 100) Successful lookaside attempts: 191 Lookaside failures due to size: 0 Lookaside failures due to OOM: 0 Pager Heap Usage: 26664 bytes Page cache hits: 4 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 1696 bytes Statement Heap/Lookaside Usage: 4096 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 39 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 4096 Bytes received by read(): 7854 Bytes sent to write(): 2659 Read() system calls: 18 Write() system calls: 2 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 95016 (max 104744) bytes Number of Outstanding Allocations: 182 (max 210) Number of Pcache Overflow Bytes: 30040 (max 30040) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 66 (max 100) Successful lookaside attempts: 236 Lookaside failures due to size: 1 Lookaside failures due to OOM: 0 Pager Heap Usage: 26664 bytes Page cache hits: 2 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 1704 bytes Statement Heap/Lookaside Usage: 5616 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 72 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 5616 Bytes received by read(): 7951 Bytes sent to write(): 3996 Read() system calls: 20 Write() system calls: 3 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 96368 (max 106096) bytes Number of Outstanding Allocations: 184 (max 210) Number of Pcache Overflow Bytes: 30040 (max 30040) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 71 (max 100) Successful lookaside attempts: 307 Lookaside failures due to size: 3 Lookaside failures due to OOM: 0 Pager Heap Usage: 26664 bytes Page cache hits: 2 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 1712 bytes Statement Heap/Lookaside Usage: 8672 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 165 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 8672 Bytes received by read(): 8048 Bytes sent to write(): 5333 Read() system calls: 22 Write() system calls: 4 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 91064 (max 106096) bytes Number of Outstanding Allocations: 179 (max 210) Number of Pcache Overflow Bytes: 30040 (max 30040) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 51 (max 100) Successful lookaside attempts: 310 Lookaside failures due to size: 3 Lookaside failures due to OOM: 0 Pager Heap Usage: 26664 bytes Page cache hits: 0 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 1712 bytes Statement Heap/Lookaside Usage: 2528 bytes Fullscan Steps: 0 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 3 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 2528 Bytes received by read(): 8145 Bytes sent to write(): 6671 Read() system calls: 24 Write() system calls: 5 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 one-a one-c two-a two-b three-a three-c Memory Used: 91080 (max 106096) bytes Number of Outstanding Allocations: 181 (max 210) Number of Pcache Overflow Bytes: 30040 (max 30040) bytes Largest Allocation: 48000 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 61 (max 100) Successful lookaside attempts: 359 Lookaside failures due to size: 3 Lookaside failures due to OOM: 0 Pager Heap Usage: 26664 bytes Page cache hits: 4 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 1728 bytes Statement Heap/Lookaside Usage: 3552 bytes Fullscan Steps: 2 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 47 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 3552 Bytes received by read(): 8242 Bytes sent to write(): 8007 Read() system calls: 26 Write() system calls: 6 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 Memory Used: 208024 (max 681040) bytes Number of Outstanding Allocations: 218 (max 302) Number of Pcache Overflow Bytes: 38240 (max 71040) bytes Largest Allocation: 87360 bytes Largest Pcache Allocation: 4368 bytes Lookaside Slots Used: 99 (max 123) Successful lookaside attempts: 699 Lookaside failures due to size: 6 Lookaside failures due to OOM: 214 Pager Heap Usage: 35896 bytes Page cache hits: 13 Page cache misses: 0 Page cache writes: 0 Page cache spills: 0 Temporary data spilled to disk: 0 Schema Heap Usage: 1696 bytes Statement Heap/Lookaside Usage: 42944 bytes Fullscan Steps: 12 Sort Operations: 0 Autoindex Inserts: 0 Virtual Machine Steps: 257 Reprepare operations: 0 Number of times run: 1 Memory used by prepared stmt: 42944 Bytes received by read(): 8383 Bytes sent to write(): 9384 Read() system calls: 30 Write() system calls: 7 Bytes read from storage: 0 Bytes written to storage: 0 Cancelled write bytes: 0 ``` ## Flag ``` -stats ```