22 KiB
22 KiB
Summary
**No review yet**Minimized query
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
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
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
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