340 lines
13 KiB
Markdown
340 lines
13 KiB
Markdown
## Summary
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<!--Explain briefly what goes wrong and explain why you believe this is a bug and not the intended behavior of SQLite (if it is not a crash).-->**No review yet**
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## Minimized query
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```sql
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PRAGMA vdbe_addoptrace = FALSE;
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.imposter off
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PRAGMA synchronous;
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.stats
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CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z");
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DROP TABLE t0;
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VACUUM main;
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.stats
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CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z");
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DROP TABLE t0;
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VACUUM main;
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.stats
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CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z");
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DROP TABLE t0;
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VACUUM main;
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.stats
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CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z");
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DROP TABLE t0;
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VACUUM main;
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.stats
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CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z");
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DROP TABLE t0;
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VACUUM main;
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.stats
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CREATE VIRTUAL TABLE t0 USING fts4("x", "y", "z");
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DROP TABLE t0;
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VACUUM main;
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VACUUM main;
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PRAGMA empty_result_callbacks = YES;
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```
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## Actual output
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```sql
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2
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Memory Used: 67704 (max 67744) bytes
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Number of Outstanding Allocations: 141 (max 142)
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Number of Pcache Overflow Bytes: 8464 (max 8464) bytes
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Largest Allocation: 48000 bytes
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Largest Pcache Allocation: 4360 bytes
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Lookaside Slots Used: 32 (max 75)
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Successful lookaside attempts: 92
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Lookaside failures due to size: 0
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9248 bytes
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Page cache hits: 0
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Schema Heap Usage: 736 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 6952
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Bytes sent to write(): 2
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Read() system calls: 13
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Write() system calls: 1
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 66952 (max 331000) bytes
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Number of Outstanding Allocations: 123 (max 259)
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Number of Pcache Overflow Bytes: 8464 (max 55144) bytes
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Largest Allocation: 87200 bytes
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Largest Pcache Allocation: 4360 bytes
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Lookaside Slots Used: 32 (max 96)
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Successful lookaside attempts: 1204
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Lookaside failures due to size: 6
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9248 bytes
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Page cache hits: 56
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7302
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Bytes sent to write(): 1010
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Read() system calls: 16
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Write() system calls: 2
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 66952 (max 331032) bytes
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Number of Outstanding Allocations: 123 (max 263)
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Number of Pcache Overflow Bytes: 8464 (max 55144) bytes
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Largest Allocation: 87200 bytes
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Largest Pcache Allocation: 4360 bytes
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Lookaside Slots Used: 32 (max 96)
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Successful lookaside attempts: 2316
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Lookaside failures due to size: 12
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9248 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7399
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Bytes sent to write(): 2024
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Read() system calls: 18
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Write() system calls: 3
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 66952 (max 331032) bytes
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Number of Outstanding Allocations: 123 (max 263)
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Number of Pcache Overflow Bytes: 8464 (max 55144) bytes
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Largest Allocation: 87200 bytes
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Largest Pcache Allocation: 4360 bytes
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Lookaside Slots Used: 32 (max 96)
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Successful lookaside attempts: 3428
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Lookaside failures due to size: 18
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9248 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7496
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Bytes sent to write(): 3039
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Read() system calls: 20
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Write() system calls: 4
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 66952 (max 331032) bytes
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Number of Outstanding Allocations: 123 (max 263)
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Number of Pcache Overflow Bytes: 8464 (max 55144) bytes
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Largest Allocation: 87200 bytes
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Largest Pcache Allocation: 4360 bytes
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Lookaside Slots Used: 32 (max 96)
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Successful lookaside attempts: 4540
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Lookaside failures due to size: 24
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9248 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7593
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Bytes sent to write(): 4054
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Read() system calls: 22
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Write() system calls: 5
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 66952 (max 331032) bytes
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Number of Outstanding Allocations: 123 (max 263)
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Number of Pcache Overflow Bytes: 8464 (max 55144) bytes
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Largest Allocation: 87200 bytes
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Largest Pcache Allocation: 4360 bytes
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Lookaside Slots Used: 32 (max 96)
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Successful lookaside attempts: 5652
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Lookaside failures due to size: 30
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9248 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7690
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Bytes sent to write(): 5069
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Read() system calls: 24
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Write() system calls: 6
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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```
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## Expectation
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```sql
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2
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Memory Used: 68416 (max 68448) bytes
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Number of Outstanding Allocations: 151 (max 152)
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Number of Pcache Overflow Bytes: 8472 (max 8472) bytes
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Largest Allocation: 48000 bytes
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Largest Pcache Allocation: 4368 bytes
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Lookaside Slots Used: 48 (max 86)
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Successful lookaside attempts: 103
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Lookaside failures due to size: 0
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9256 bytes
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Page cache hits: 0
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Temporary data spilled to disk: 0
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Schema Heap Usage: 632 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7728
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Bytes sent to write(): 2
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Read() system calls: 14
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Write() system calls: 1
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 71880 (max 331576) bytes
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Number of Outstanding Allocations: 134 (max 262)
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Number of Pcache Overflow Bytes: 12568 (max 55176) bytes
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Largest Allocation: 87360 bytes
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Largest Pcache Allocation: 4368 bytes
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Lookaside Slots Used: 48 (max 104)
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Successful lookaside attempts: 1109
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Lookaside failures due to size: 6
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9256 bytes
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Page cache hits: 56
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Temporary data spilled to disk: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7866
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Bytes sent to write(): 1050
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Read() system calls: 17
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Write() system calls: 2
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 71880 (max 331576) bytes
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Number of Outstanding Allocations: 134 (max 262)
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Number of Pcache Overflow Bytes: 12568 (max 55176) bytes
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Largest Allocation: 87360 bytes
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Largest Pcache Allocation: 4368 bytes
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Lookaside Slots Used: 48 (max 104)
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Successful lookaside attempts: 2115
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Lookaside failures due to size: 12
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9256 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Temporary data spilled to disk: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 7963
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Bytes sent to write(): 2105
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Read() system calls: 19
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Write() system calls: 3
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 71880 (max 331576) bytes
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Number of Outstanding Allocations: 134 (max 262)
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Number of Pcache Overflow Bytes: 12568 (max 55176) bytes
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Largest Allocation: 87360 bytes
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Largest Pcache Allocation: 4368 bytes
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Lookaside Slots Used: 48 (max 104)
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Successful lookaside attempts: 3121
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Lookaside failures due to size: 18
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9256 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Temporary data spilled to disk: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 8060
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Bytes sent to write(): 3161
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Read() system calls: 21
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Write() system calls: 4
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 71880 (max 331576) bytes
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Number of Outstanding Allocations: 134 (max 262)
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Number of Pcache Overflow Bytes: 12568 (max 55176) bytes
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Largest Allocation: 87360 bytes
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Largest Pcache Allocation: 4368 bytes
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Lookaside Slots Used: 48 (max 104)
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Successful lookaside attempts: 4127
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Lookaside failures due to size: 24
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9256 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Temporary data spilled to disk: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 8157
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Bytes sent to write(): 4217
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Read() system calls: 23
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Write() system calls: 5
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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Memory Used: 71880 (max 331576) bytes
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Number of Outstanding Allocations: 134 (max 262)
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Number of Pcache Overflow Bytes: 12568 (max 55176) bytes
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Largest Allocation: 87360 bytes
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Largest Pcache Allocation: 4368 bytes
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Lookaside Slots Used: 48 (max 104)
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Successful lookaside attempts: 5133
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Lookaside failures due to size: 30
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Lookaside failures due to OOM: 0
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Pager Heap Usage: 9256 bytes
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Page cache hits: 58
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Page cache misses: 0
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Page cache writes: 0
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Page cache spills: 0
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Temporary data spilled to disk: 0
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Schema Heap Usage: 0 bytes
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Statement Heap/Lookaside Usage: 0 bytes
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Bytes received by read(): 8254
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Bytes sent to write(): 5273
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Read() system calls: 25
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Write() system calls: 6
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Bytes read from storage: 0
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Bytes written to storage: 0
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Cancelled write bytes: 0
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```
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## Flag
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```
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```
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