This is a port of the official ext/misc/vfsstat.c sqlite3 extension. It implements a VFS and a virtual table that keeps IO statistics.
Query the virtual table by issuing SELECT * FROM vtabstat.
cargo build --releaseOutput will be located at target/release/libvfsstat_rs.so
Note: The crate includes trace and debug logs using the log crate but does not provide a log backend, so logs will not show up anywhere unless you set up a backend such as env_logger yourself.
Assuming libvfsstat_rs.so is in current directory,
$ sqlite3
sqlite> .load ./libvfsstat_rs
sqlite> .open ../../test.db
sqlite> .schema
CREATE TABLE person (
id INTEGER PRIMARY KEY,
name TEXT NOT NULL UNIQUE,
data BLOB
);
sqlite> select * from person;
id name data
-- -------------------------------- -------------
1 Steven NULL
2 05504B041661AAD1320A8537EB8234D2 zÔ];[^;H
3 4967EEDBF69420D82C6B1BCFB31397DD ?BiΘI
4 19D0F5974A48AA561B7097CDA39E4047
l!Xk- 5
5 1F1FFD477777F5AA5CBFF916A4AF9593 + 텸vy\Y
6 0925676226D46FB4EC6DAEB11D130350 <</jޏ
7 5D6F4F219D2E3FAF7D61CA5237F106F8 (nlZ
8 FFD140BD25C1CA899446F2C9C2631A51 ,9^< p
9 F9F66F44D64FC54FDFAEBD3750FD3513 [C@E
sqlite> select * from vtabstat;
file stat count
-------------- ----------- -----
main bytesIn 12388
main bytesOut 0
main read 4
main write 0
main sync 0
main open 1
main lock 1
main access 0
main delete 0
main fullPath 0
main random 0
main sleep 0
main currentTime 0
journal bytesIn 0
journal bytesOut 0
journal read 0
journal write 0
journal sync 0
journal open 0
journal lock 0
journal access 0
journal delete 0
journal fullPath 0
journal random 0
journal sleep 0
journal currentTime 0
wal bytesIn 0
wal bytesOut 0
wal read 0
wal write 0
wal sync 0
wal open 1
wal lock 0
wal access 0
wal delete 0
wal fullPath 0
wal random 0
wal sleep 0
wal currentTime 0
master-journal bytesIn 0
master-journal bytesOut 0
master-journal read 0
master-journal write 0
master-journal sync 0
master-journal open 0
master-journal lock 0
master-journal access 0
master-journal delete 0
master-journal fullPath 0
master-journal random 0
master-journal sleep 0
master-journal currentTime 0
sub-journal bytesIn 0
sub-journal bytesOut 0
sub-journal read 0
sub-journal write 0
sub-journal sync 0
sub-journal open 0
sub-journal lock 0
sub-journal access 0
sub-journal delete 0
sub-journal fullPath 0
sub-journal random 0
sub-journal sleep 0
sub-journal currentTime 0
temp-database bytesIn 0
temp-database bytesOut 0
temp-database read 0
temp-database write 0
temp-database sync 0
temp-database open 0
temp-database lock 0
temp-database access 0
temp-database delete 0
temp-database fullPath 0
temp-database random 0
temp-database sleep 0
temp-database currentTime 0
temp-journal bytesIn 0
temp-journal bytesOut 0
temp-journal read 0
temp-journal write 0
temp-journal sync 0
temp-journal open 0
temp-journal lock 0
temp-journal access 0
temp-journal delete 0
temp-journal fullPath 0
temp-journal random 0
temp-journal sleep 0
temp-journal currentTime 0
transient-db bytesIn 0
transient-db bytesOut 0
transient-db read 0
transient-db write 0
transient-db sync 0
transient-db open 0
transient-db lock 0
transient-db access 0
transient-db delete 0
transient-db fullPath 0
transient-db random 0
transient-db sleep 0
transient-db currentTime 0
* bytesIn 0
* bytesOut 0
* read 0
* write 0
* sync 0
* open 0
* lock 0
* access 2
* delete 0
* fullPath 1
* random 0
* sleep 0