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How do I discover memory usage of my application in Android?
...ther total
size: 10940 7047 N/A 17987
allocated: 8943 5516 N/A 14459
free: 336 1531 N/A 1867
(Pss): 4585 9282 11916 25783
(shared dirty): 2184 3596 916 6696
(priv dirty)...
What are the -Xms and -Xmx parameters when starting JVM?
...
The flag Xmx specifies the maximum memory allocation pool for a Java virtual machine (JVM), while Xms specifies the initial memory allocation pool.
This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of ...
Is delete this allowed?
...as defined results, as long as (as you've noted) you assure the object was allocated dynamically, and (of course) never attempt to use the object after it's destroyed. Over the years, many questions have been asked about what the standard says specifically about delete this;, as opposed to deleting ...
How to create a memory leak in Java?
...The thread loads a class via an (optionally custom) ClassLoader.
The class allocates a large chunk of memory (e.g. new byte[1000000]), stores a strong reference to it in a static field, and then stores a reference to itself in a ThreadLocal. Allocating the extra memory is optional (leaking the clas...
What's the difference between VARCHAR and CHAR?
...n hold is 255 characters.
It's 50% faster than VARCHAR.
Uses static memory allocation.
VARCHAR
Used to store variable length alphanumeric data.
The maximum this data type can hold is up to
Pre-MySQL 5.0.3: 255 characters.
Post-MySQL 5.0.3: 65,535 characters shared for the row.
It's slower tha...
How can I set a custom date time format in Oracle SQL Developer?
...
It is important to note that the 'AM' format token is removed for the 24-hour format. If both the 'AM' and 'HH24' tokens are used, the 'AM' overrides the 'HH24'.
– macawm
May 27 '16 at 14:42
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How to set the maximum memory usage for JVM?
...Xms and -Xmx options only regulate the jvm heap size, not the total memory allocation.
– Peter De Winter
Mar 21 '18 at 9:30
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show 4 more co...
Is it possible to prevent an NSURLRequest from caching data or remove cached data following a reques
...e, I perform a HTTP request using NSURLRequest for a chunk of data. Object allocation spikes and I assign the data accordingly. When I finish with the data, I free it up accordingly - however instruments doesn't show any data to have been freed!
...
boost::flat_map and its performance compared to map and unordered_map
... few variations of the scenario.
A container performance is affected by:
Allocator
size of contained type
cost of implementation of copy operation, assignment operation, move operation, construction operation, of the contained type.
number of elements in the container (size of the problem)
type ha...
How to read a line from the console in C?
...ters it read. So you use fgetc:
char * getline(void) {
char * line = malloc(100), * linep = line;
size_t lenmax = 100, len = lenmax;
int c;
if(line == NULL)
return NULL;
for(;;) {
c = fgetc(stdin);
if(c == EOF)
break;
if(--len == 0)...