What Is the Size Limit for Logcat and How to Change Its Capacity

What is the size limit for Logcat and how to change its capacity?

To see the size use -g

$ adb logcat -g
ring buffer is 64Kb (63Kb consumed), max entry is 4096b, max payload is 4076b

How to change size of logcat buffer in Android?

According to the newsgroup Android Developers, logcat buffer size:

The log buffers on the device are 64 KB. The timestamp, process ID,
and log level are stored in a compact format, so you may actually get
more than 64 KB of formatted data out of logcat -d -v <mode>.

Android studio maximum number of lines logcat

I'd like to add an update to this question, in case anyone else is looking for a way to change this on or after March of 2017.

The latest version of Android Studio, version 2.3, now has an option to change the size of the cyclic logcat buffer in Settings/Preferences.

Go to Settings/Preferences > Editor > General > Console and enable the Override console cyclic buffer size (1024KB) option. Once you enable this setting, you can enter a value in kilobytes for the logcat buffer.

It would have been better if Google added the word "logcat" in there, because it can't be found with a search of the preferences unless you specifically enter "console" or "cyclic", etc.

Edit: Google have now assigned this issue to a developer. It should be implemented soon, and I'll update this answer when it is.

Edit 2: According to Google, they have now added a setting for logcat's buffer to Dolphin Canary 6 release, and the issue is now marked as fixed.

Android - Set max length of logcat messages

There is a fixed size buffer in logcat for binary logs (/dev/log/events) and this limit is 1024 bytes.
For the non-binary logs there is also a limit:

#define LOGGER_ENTRY_MAX_LEN        (4*1024)
#define LOGGER_ENTRY_MAX_PAYLOAD (LOGGER_ENTRY_MAX_LEN - sizeof(struct logger_entry))

So the real message size for both binary and non-binary logs is ~4076 bytes.
The kernel logger interface imposes this LOGGER_ENTRY_MAX_PAYLOAD limit.

The liblog sources (used by logcat) also say:

• The message may have been truncated by the kernel log driver.

I would recommend you the nxlog tool which does not use the logcat binary, but due to the limitations in the kernel I doubt that it will solve your problem. Nevertheless, it might be worth a try. (disclaimer: I'm the author.)

Android Studio logcat history/buffer size

You can also do it per project, via the IDE:
Settings->Editor->General->Console: tick "Override console cycle buffer size. Enter your desired size in the text box.

Finally restart Android Studio for the changes to take effect.

Why does LogCat not show the full message?

Because your logcat has reached its max size, see What is the size limit for Logcat and how to change its capacity?

Try using this code to write your result into a text file in sdcard, then use DDMS to get it.

 public static void appendLog(String text)
{
    File logFile = new File("sdcard/log.txt");
    if (!logFile.exists())
    {
        try
        {
            logFile.createNewFile();
        } catch (IOException e)
        {
            e.printStackTrace();
        }
    }
    try
    {
        // BufferedWriter for performance, true to set append to file flag
        BufferedWriter buf = new BufferedWriter(new FileWriter(logFile, true));
        buf.append(text);
        buf.newLine();
        buf.close();
    } catch (IOException e)
    {
        e.printStackTrace();
    }
}

Is there any limit of bundle in Android?

I think the limit is 500kb.
You can save the passed object in a file and send the path of the file in the bundle instead.
You can check similar question asked by me at SO

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