Important Note Since this question was asked, Sanked Patel gave a talk at PyCon India 2019 about how to fix memory leaks in Flask. This is a summary of his strategy. Minimal Example Suppose you have a simple stateless Flask app with only one endpoint named ‘foo’. Note that the other endpoints ‘memory’ and ‘snapshot’ … Read more
I was able to figure this out myself. There are two places to change. First, disable IdentityMap. In config/application.rb config.active_record.identity_map = false Second, use uncached to wrap up the loop class MemoryTestController < ApplicationController def go ActiveRecord::Base.uncached do Person.find_each do |person| # whatever operation end end end end Now my memory use is under control. … Read more
In your onDestroy method you could try something like this: ImageView imageView = (ImageView)findViewById(R.id.my_image); Drawable drawable = imageView.getDrawable(); if (drawable instanceof BitmapDrawable) { BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable; Bitmap bitmap = bitmapDrawable.getBitmap(); bitmap.recycle(); } The cast should work since setImageBitmap is implemented as public void setImageBitmap(Bitmap bm) { setImageDrawable(new BitmapDrawable(mContext.getResources(), bm)); }
The error is misleading. It really should say “A large enough contiguous space in virtual memory could not be found to perform the operation”. Over time allocations and deallocations of virtual memory space leads to it becoming fragmented. This can lead to situations where a large allocation cannot be filled despite there being a plenty … Read more
And the answer is cache. I don’t know what it is, but this thing grows. It seems to be related to jQuery. Maybe it’s the jQuery element cache. Do you by any chance apply a jQuery plugin on one or more elements after every service call? Update The problem is that HTML elements are added, … Read more
‘The’ answer (Read more below if you want to see how I got to this solution) Usage, given a control with a vanilla MouseDown event, and a specific EventHandler<ValueEventArgs> ValueEvent event: // for ‘vanilla’ events SetAnyHandler<Subscriber, MouseEventHandler, MouseEventArgs>( h => (o,e) => h(o,e), //don’t ask me, but it works*. h => control.MouseDown += h, h … Read more
It may be relevant that Perl never gives memory back to the system by itself: It’s all up to malloc() and all the rules associated with that. Knowing how malloc() allocates memory is important to answering the greater question, and it varies from system to system, but in general most malloc() implementations are optimized for … Read more
Great question! No, Both forms will be (can be) GC’d because the GC does not directly look for references in other references. It only looks for what are called “Root” references … This includes reference variables on the stack, (Variable is on the stack, actual object is of course on the heap), references variables in … Read more
Here’s a link to the bug over on jQuery, along with this as a suggested fix for jQuery 1.4.2: — jquery-1.4.2.js 2010-04-08 12:10:20.000000000 -0700 +++ jquery-1.4.2.js.fixed 2010-04-08 12:10:38.000000000 -0700 @@ -5219,7 +5219,7 @@ // Stop memory leaks if ( s.async ) { – xhr = null; + xhr.onreadystatechange = null; xhr.abort = null; xhr = … Read more
You can use the following function (The true parameter tells the GC to perform a collection first): long memory = GC.GetTotalMemory(true);