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| author | Jeff Brown <jeffbrown@google.com> | 2012-03-02 11:15:28 -0800 |
|---|---|---|
| committer | Android (Google) Code Review <android-gerrit@google.com> | 2012-03-02 11:15:28 -0800 |
| commit | db3c6b8c0d3cde8323f962bb285d7735f698a363 (patch) | |
| tree | 8d8ca4c022e1c8726fe0e51f69b0dc17f38bd0b1 | |
| parent | dddfc119e2aeb1927f50533e11ac375fc9b2a3b9 (diff) | |
| parent | b7f2736e789bb6f3a09970bf924c56b5bc44b69a (diff) | |
| download | frameworks_base-db3c6b8c0d3cde8323f962bb285d7735f698a363.zip frameworks_base-db3c6b8c0d3cde8323f962bb285d7735f698a363.tar.gz frameworks_base-db3c6b8c0d3cde8323f962bb285d7735f698a363.tar.bz2 | |
Merge "Adjust WAL checkpoint interval."
| -rwxr-xr-x | core/res/res/values/config.xml | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml index 8e5b509..bd0e798 100755 --- a/core/res/res/values/config.xml +++ b/core/res/res/values/config.xml @@ -665,9 +665,15 @@ Choices are: FULL, NORMAL, OFF. --> <string name="db_sync_mode">FULL</string> - <!-- The Write-Ahead Log auto-checkpoint interval in database pages. - The log is checkpointed automatically whenever it exceeds this many pages. --> - <integer name="db_wal_autocheckpoint">1</integer> + <!-- The Write-Ahead Log auto-checkpoint interval in database pages (typically 1 to 4KB). + The log is checkpointed automatically whenever it exceeds this many pages. + When a database is reopened, its journal mode is set back to the default + journal mode, which may cause a checkpoint operation to occur. Checkpoints + can also happen at other times when transactions are committed. + The bigger the WAL file, the longer a checkpoint operation takes, so we try + to keep the WAL file relatively small to avoid long delays. + The size of the WAL file is also constrained by 'db_journal_size_limit'. --> + <integer name="db_wal_autocheckpoint">100</integer> <!-- Max space (in MB) allocated to DownloadManager to store the downloaded files if they are to be stored in DownloadManager's data dir, |