connection pool = number of database connections opened when the app opens
a database. These pooled connections are used by readers only and they
use the sqlite write-ahead-logging option to increase reader
concurrency.
The size of this connection pool depends on the number of CPUs, RAM etc.
On most single-core devices, this can be set to 1.
But on some multi-core devices with more RAM, pool size can be
more than 1.
On a device with more resources, here are the results of a test (in
coretests/src/android/database/sqlite/SQLiteDatabaseTest.java)
which measures the reader-parallelism achieved for different connection
pool sizes.
connpool-size = 1
num xacts by writer = 467
num-reads-in-xact/NOT-in-xact by reader1 = 1358/14542, by reader2 = 1431/14269
connpool-size = 2
num xacts by writer = 473
num-reads-in-xact/NOT-in-xact by reader1 = 5703/35227, by reader2 = 6222/35898
connpool-size = 3
num xacts by writer = 542
num-reads-in-xact/NOT-in-xact by reader1 = 6531/32329, by reader2 = 6252/32728
connpool-size = 4
num xacts by writer = 578
num-reads-in-xact/NOT-in-xact by reader1 = 6009/32701, by reader2 = 5977/32953
connpool-size = 5
num xacts by writer = 547
num-reads-in-xact/NOT-in-xact by reader1 = 6554/31186, by reader2 = 5318/31022
connpool-size = 6
num xacts by writer = 534
num-reads-in-xact/NOT-in-xact by reader1 = 5317/31463, by reader2 = 5413/31537
connpool-size = 7
num xacts by writer = 549
num-reads-in-xact/NOT-in-xact by reader1 = 5396/28004, by reader2 = 5214/28496
seems like connection pool size of 3 is optimal on this device.
Change-Id: I348ff5a31783c31b5e3e5ac78b7c2cea54ef114a
This code uses a try/finally to maintain the old behavior of setting
implCreated even if creation fails.
Change-Id: Ieac05568477db4908cd4087714cf00a9addd1d20
This constant is not public yet. Continuous autofocus should
behave differently in still camera and camcorder. In camcorder,
lens movement may be more smooth. And the triggers to start a
new focus search may be different. If there is a need,
FOCUS_MODE_CONTINUOUS_PHOTO can be added in the future.
Change-Id: I05df9e491aca37829be3df92a73b952f26c86a4a
Merge commit 'aac4630cc5b3076e3cd6f65c52c8ff5f8f921957'
* commit 'aac4630cc5b3076e3cd6f65c52c8ff5f8f921957':
provide link to backup guide above the fold
Merge commit '4735be0211a996f791accc77aeb399df2258ab4c'
* commit '4735be0211a996f791accc77aeb399df2258ab4c':
New error status for "destination file already exists".
Merge commit 'a4270e7e1e09bf5f60c65102d34e887033c5befa' into gingerbread-plus-aosp
* commit 'a4270e7e1e09bf5f60c65102d34e887033c5befa':
provide link to backup guide above the fold
Merge commit '73e150c886afc6cd92e8b065a58d61e0b2a098ed' into gingerbread
* commit '73e150c886afc6cd92e8b065a58d61e0b2a098ed':
provide link to backup guide above the fold
- New API for iterating over history that will allow a better implementation
in the future.
- Now do writes asynchronously.
Also improve the documentation for Activity.onRetainNonInstanceState().
Change-Id: Idf67f2796a8868eb62f288bcbb2bad29876c8554
Merge commit 'd2319d8d9a2d2bc5edc9d7d20b7100f4c72cb2e1' into gingerbread-plus-aosp
* commit 'd2319d8d9a2d2bc5edc9d7d20b7100f4c72cb2e1':
New error status for "destination file already exists".
Also changing the behavior of the local URI column slightly to better
match the spec -- it should return the client-provided destination so
that it's valid even if the download failed.
Change-Id: Ibf9c07519e647e677ebac8b334b9f2e930e47033
Merge commit '4258bfb7a9fb18907fbfbe79ec0a937b4e7382b1' into gingerbread-plus-aosp
* commit '4258bfb7a9fb18907fbfbe79ec0a937b4e7382b1':
Fix some drawing artifacts/bugs around overlays/text anchors
Make it read proxys the correct way from CS so it works for all network types.
Add utility class for apache http client support.
bug:2700664
Change-Id: If81917b19b5f0636247a6519a1ec78bd8dbf3596
Merge commit '58e0eefeb5e2e270e2b04369bbf29fc22abda8d5' into gingerbread-plus-aosp
* commit '58e0eefeb5e2e270e2b04369bbf29fc22abda8d5':
Improve power tracking of WIFI use.
We now distribute "wifi started" time across all apps that are
holding WIFI locks that cause it to be started. But only when
WIFI would not normally be running. Also have a mechanism to
distribute other WIFI work that has happened across those processes
based on their use.
Also fixed a bug where we were not retaining the CPU speed step
stats across boots...!
Change-Id: I00e3153b98429166273750512cc37e7975211ab9
Merge commit 'b08013c312e3d849029a2f4c11889274c00f438d' into gingerbread-plus-aosp
* commit 'b08013c312e3d849029a2f4c11889274c00f438d':
Added overlay support for drawing/responding to text anchors.
Overlays let views draw and respond to touch events outside of their
bounds. This allows selection anchors to be friendlier and easier to
grab. This is currently private API, pending further evaluation.
Added themes/styles for text selection anchors.
Added assets for text selection anchors as provided by UX. The
left/right anchors are currently not suitable for use. They are here
for bookkeeping and replacement later. The theme currently uses the
'middle' anchor asset for all three. This will be changed once assets
are ready.
Change-Id: I01b21e5ae90cab201f86f38f2f5eeaf2bd7f6bcd
This preferred width will be set between the default viewport width and
the max fixed viewport width. The default viewport width serves as the
minimum fixed viewport width, so it's lowered to 980.
This change will make the shirt.woot.com/blog site works better, since it's using
1080 as the preferred width, so user needs not to scroll in overview mode.
issue: 3003933
Change-Id: Ie3eed44a54d277f5bc5f63cd394d463012a80d80
