❔ Out of memory exception
Hello,
I have the following code
private static void StringBuilderTest()
{
ConcurrentDictionary<int, string> concurrentDictionary = new ConcurrentDictionary<int, string>();
for (int i = 0; i < 1500; i++)
{
concurrentDictionary[i] = getBigStringWith60KCharecters();
}
int counter = 1;
Collection<int> ids = new Collection<int>();
StringBuilder caseExpression = new StringBuilder();
try
{
foreach (KeyValuePair<int, string> keyValuePair in concurrentDictionary)
{
ids.Add(keyValuePair.Key);
caseExpression.AppendLine($"WHEN Document_Id = {keyValuePair.Key} THEN {keyValuePair.Value}");
const int MAX_PREFERD_AMOUNT_OF_CHARECTERS = 100000000;
if (caseExpression.Length > MAX_PREFERD_AMOUNT_OF_CHARECTERS || counter == concurrentDictionary.Count)
{
string tempString = caseExpression.ToString();
TryUpdateBatchOfWebDocuments(tempString, ids);
caseExpression.Clear();
ids.Clear();
}
counter++;
}
}
catch (Exception exc)
{
throw;
}
}
The code in question involves the manipulation of strings using both the string and StringBuilder classes. From my understanding, neither the string nor the StringBuilder object is reaching its maximum capacity, which is approximately 2 billion characters. Despite this, I am still encountering the memory exception.
I am wondering if there could be any other factors contributing to this issue. Are there any limitations on the maximum capacity of virtual memory that I should be aware of?5 Replies
cut your assumption for maximum string capacity in half
.NET objects can't be bigger than 2GB and characters are 2 bytes each
well it would be still around 1 bilion im trying to allocate until around 100 milion
... what you trying to achieve?
I’m getting an document from db around 1,500 of them
Doing manipulation on each one of them in parallel
and after I finished I need to update the db with the new document so I create a big query to update the db
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/close - otherwise I will mark this as stale and this post will be archived until there is new activity.