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MySQL high CPU usage [closed]
...se MySQL to eat up CPU.
You'll also probably want to give the following a read over as they contain some good information.
How MySQL Uses Memory
MySQL System Variables
It's also a very good idea to use a profiler. Something you can turn on when you want that will show you what queries your appl...
What does FETCH_HEAD in Git mean?
...Consider also, still with Git 2.29 (Q4 2020), the FETCH_HEAD is now always read from the filesystem regardless of the ref backend in use, as its format is much richer than the normal refs, and written directly by "git fetch"(man) as a plain file..
See commit e811530, commit 5085aef, commit 4877c6c, ...
Android: java.lang.SecurityException: Permission Denial: start Intent
...T_COMPLETED"/> <uses-permission android:name="android.permission.READ_CONTACTS"/> <uses-permission android:name="android.permission.READ_SYNC_SETTINGS"/> <uses-permission android:name="android.permission.READ_OWNER_DATA"/> <uses-permission android:name="androi...
How can I extract a predetermined range of lines from a text file on Unix?
...
You don't need the cat command; head can read a file directly. This is slower than many alternatives because it uses 2 (3 as shown) commands where 1 is sufficient.
– Jonathan Leffler
Jan 5 '15 at 18:41
...
What's the u prefix in a Python string?
...ead simplest, probably flawed, solution this second.
A: You should really read Joel's Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) essay on character sets.
Q: sry no time code pls
A: Fine. try str('Some String') or 'Some...
PostgreSQL ERROR: canceling statement due to conflict with recovery
...be canceled more often.
You can work around this by starting a repeatable read transaction on primary which does a dummy query and then sits idle while a real query is run on secondary. Its presence will prevent vacuuming of old row versions on primary.
More on this subject and other workarounds a...
How can I use inverse or negative wildcards when pattern matching in a unix/linux shell?
...@MarkStosberg. Although, one fringe benefit of this technique is you could read exclusions from an actual file, e.g. comm -23 <(ls) exclude_these.list
– James M. Lay
Dec 5 '17 at 18:10
...
What happens to a declared, uninitialized variable in C? Does it have a value?
... // also zero
}
Non-static variables (local variables) are indeterminate. Reading them prior to assigning a value results in undefined behavior.
void foo() {
int x;
printf("%d", x); // the compiler is free to crash here
}
In practice, they tend to just have some nonsensical value in there ...
Java ByteBuffer to String
... FileChannel.open(
Paths.get("files/text-latin1.txt", StandardOpenOption.READ);
ByteBuffer buffer = ByteBuffer.allocate(1024);
channel.read(buffer);
CharSet latin1 = StandardCharsets.ISO_8859_1;
CharBuffer latin1Buffer = latin1.decode(buffer);
String result = new String(latin1Buffer.array());
...
Static variable inside of a function in C
... the static int x (scope) part of the statement actually applies where you read it, somewhere INSIDE the function and only from there onwards, not above it inside the function.
However the x = 5 (lifetime) part of the statement is initialization of the variable and happening OUTSIDE of the function...