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| author | Fyodor Kupolov <fkupolov@google.com> | 2017-10-25 16:09:35 -0700 |
|---|---|---|
| committer | Fyodor Kupolov <fkupolov@google.com> | 2017-10-26 11:21:19 -0700 |
| commit | 5bd43ad2e7e4e1ee2c31d920ba4b148bbdf74d11 (patch) | |
| tree | 5e89bd4ae207a4564f5df8f2d67eeba5fb555b0d /tools/aapt2/java/JavaClassGenerator_test.cpp | |
| parent | 75dcc4f040199f410e680fc5938aeae53c501d7a (diff) | |
Initial version of compatibility WAL
In this mode, only database journal mode will be changed, connection pool
size will still be limited to a single connection.
If enabled, compatibility WAL mode will be used if an app hasn't explicitly
requested journal mode, by calling disable/enableWriteAheadLogging.
Compatibility WAL mode is controlled by debug.sqlite.use_compatibility_wal
property and db_use_compatibility_wal config resource.
Impact on write performance:
On ext4, with WAL, there is approx 300% increase in speed of update operations
On f2fs, with WAL, there is approx 5% increase in speed of update operations
Impact on number of writes:
On ext4, switching to WAL reduces the number of writes by approx 50%.
On f2fs, switching to WAL increases the number of writes by approx 15%.
Test: CtsDatabaseTestCases
Test: manual, running device
Bug: 33044236
Change-Id: Iaffb5651df39d8c9f710d7dbbe174f9c0d8a3186
Diffstat (limited to 'tools/aapt2/java/JavaClassGenerator_test.cpp')
0 files changed, 0 insertions, 0 deletions