minio/cmd/server-rlimit_test.go
Harshavardhana 7765081db7 cache: Increasing caching GC percent from 20 to 50. (#4041)
Previous value was set to avoid large cache value build
up but we can clearly see this can cause lots of GC
pauses which can lead to significant drop in performance.

Change this value to 50% and decrease the value to 25%
once the 75% cache size is used. To have a larger
window for GC pauses.

Another change is to only allow caching if a server has
more than 24GB of RAM instead of 8GB.
2017-04-15 02:16:49 -07:00

44 lines
1.4 KiB
Go

/*
* Minio Cloud Storage, (C) 2017 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import "testing"
func TestGetMaxCacheSize(t *testing.T) {
testCases := []struct {
curLimit uint64
totalRAM uint64
expectedResult uint64
}{
{uint64(0), uint64(0), uint64(0)},
{minRAMSize, uint64(0), uint64(0)},
{uint64(0), minRAMSize, uint64(0)},
{uint64(18446744073709551615), uint64(8115998720), uint64(0)},
{uint64(8115998720), uint64(16115998720), uint64(0)},
{minRAMSize, minRAMSize, uint64(12884901888)},
{minRAMSize, uint64(16115998720), uint64(0)},
{uint64(18446744073709551615), uint64(10115998720), uint64(0)},
}
for i, testCase := range testCases {
cacheSize := getMaxCacheSize(testCase.curLimit, testCase.totalRAM)
if testCase.expectedResult != cacheSize {
t.Fatalf("Test %d, Expected: %v, Got: %v", i+1, testCase.expectedResult, cacheSize)
}
}
}