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How to create a CPU spike with a bash command
...ate a near 100% load on a Linux machine. It's quad core system and I want all cores going full speed. Ideally, the CPU load would last a designated amount of time and then stop. I'm hoping there's some trick in bash. I'm thinking some sort of infinite loop.
...
Postgres could not connect to server
...ew update and brew upgrade, my postgres got some problem. I tried to uninstall postgres and install again, but it didn't work as well.
...
How does having a dynamic variable affect performance?
...Generator();
if (!method.IsStatic)
{
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Unbox_Any, method.DeclaringType);
}
var parameters = method.GetParameters();
for (int i = 0; i < parameters.Length; i++)
{
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCo...
How Pony (ORM) does its tricks?
...ecode instructions one-by-one.
For each instruction the decompiler object calls its own method.
The name of this method is equal to the name of current bytecode instruction.
When Python calculates an expression, it uses stack, which stores an intermediate
result of calculation. The decompiler objec...
YYYY-MM-DD format date in shell script
...
$(date +%F_%H-%M-%S)
can be used to remove colons (:) in between
output
2018-06-20_09-55-58
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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...cle Database 11g Release 2 and above - by default, no, but an alternative called edition-based redefinition exists
Older versions of Oracle - no; DDL causes an implicit commit
SQL Server - yes
Sybase Adaptive Server - yes
DB2 - yes
Informix - yes
Firebird (Interbase) - yes
SQLite also appears to h...
Disabling swap files creation in vim
...ere a way to disable .swp files creation in vim? or at least create them all in one place so I can find and delete them easily.
...
When to use volatile with multi threading?
....
However two threads both accessing a shared variable is something which calls for protection via a mutex isn't it?
But in that case, between the thread locking and releasing the mutex the code is in a critical section where only that one thread can access the variable, in which case the variable ...
String difference in Bash
...e is some difference between the two strings?
– alpha_989
Aug 10 '17 at 15:28
@alpha_989 , here's your answer: $ diff ...
OPTION (RECOMPILE) is Always Faster; Why?
...or the same thing.
When a stored procedure is created (I suspect you are calling ad-hoc sql from .NET but if you are using a parameterized query then this ends up being a stored proc call) SQL Server attempts to determine the most effective execution plan for this query based on the data in your da...