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DnsServer: cache auto prefetch refresh timer trigger and interval changed for optimization after experimentations. Fixed issue of failing to update prefetch timer interval when settings updated.

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This commit is contained in:
Shreyas Zare
2019-05-18 12:52:43 +05:30
parent aa0dde3dd6
commit 499ef38257
1 changed files with 12 additions and 7 deletions
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19
DnsServerCore/DnsServer.cs
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@@ -107,7 +107,6 @@ namespace DnsServerCore
Timer _cachePrefetchRefreshTimer;
readonly object _cachePrefetchRefreshTimerLock = new object();
const int CACHE_PREFETCH_REFRESH_TIMER_INITIAL_INTEVAL = 60000;
const int CACHE_PREFETCH_REFRESH_TIMER_PERIODIC_INTERVAL = 10000;
DateTime _cachePrefetchSamplingTimerTriggersOn;
DnsQuestionRecord[] _cachePrefetchSampleList;
@@ -1458,7 +1457,7 @@ namespace DnsServerCore
if (sampleQuestion == null)
continue;
if (!CacheRefreshNeeded(sampleQuestion, _cachePrefetchTrigger))
if (!CacheRefreshNeeded(sampleQuestion, _cachePrefetchTrigger + 2))
continue;
int sampleQuestionIndex = i;
@@ -1507,7 +1506,7 @@ namespace DnsServerCore
lock (_cachePrefetchRefreshTimerLock)
{
if (_cachePrefetchRefreshTimer != null)
_cachePrefetchRefreshTimer.Change(CACHE_PREFETCH_REFRESH_TIMER_PERIODIC_INTERVAL, System.Threading.Timeout.Infinite);
_cachePrefetchRefreshTimer.Change((_cachePrefetchTrigger + 1) * 1000, System.Threading.Timeout.Infinite);
}
}
}
@@ -2035,9 +2034,11 @@ namespace DnsServerCore
if (value < 0)
throw new ArgumentOutOfRangeException("CachePrefetchTrigger", "Valid value is greater that or equal to 0.");
_cachePrefetchTrigger = value;
ResetPrefetchTimers();
if (_cachePrefetchTrigger != value)
{
_cachePrefetchTrigger = value;
ResetPrefetchTimers();
}
}
}
@@ -2049,7 +2050,11 @@ namespace DnsServerCore
if ((value < 1) || (value > 60))
throw new ArgumentOutOfRangeException("CacheRefreshSampleIntervalInMinutes", "Valid range is between 1 and 60 minutes.");
_cachePrefetchSampleIntervalInMinutes = value;
if (_cachePrefetchSampleIntervalInMinutes != value)
{
_cachePrefetchSampleIntervalInMinutes = value;
ResetPrefetchTimers();
}
}
}