Delays in writting to the globals when journal is on
From xbarinka@gmail.com@21:1/5 to All on Thu Jul 9 07:07:25 2020
Hello,
we were using very old version 5.4-001 of GTM for long time and we had no problems with the performance of writing to the globals. We were using journaling all the time.
Since we started using version 6.3-000 we sometimes encountered strange lagging. After deeper analysis we recognised that the problem is in the journaling. If we stop the journaling than the lagging disappears. Everything is the same as on the older
version - same OS, sw and hw.
We tried to measure the delays and when the journaling is off the write operation oscillates between 1ms to 7ms. When the journaling is on then the write operation is almost always only 1ms but suddenly one write takes 500ms and more. It's like the
operations are cached or something like that.