[
https://issues.apache.org/jira/browse/IGNITE-8449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sergey Kosarev updated IGNITE-8449:
-----------------------------------
Description:
we have in
org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtPartitionTopologyImpl#update(org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionExchangeId,
org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionMap,
boolean)
currently we have something like this
{code:java}
ctx.database().checkpointReadLock();
try {
.......
if (isStaleUpdate(cur, parts)) {
....
return false;
}
.....
}
finally {
ctx.database().checkpointReadUnlock();
}
{code}
we'd better do not accquire those lock for isStaleUpdate == true branch. It
can decrease contention as this method is hot (thousandsa invocations per
minute) see
> Avoid empty acquiring/releasing checkpointReadLock for stale updates
> --------------------------------------------------------------------
>
> Key: IGNITE-8449
> URL: https://issues.apache.org/jira/browse/IGNITE-8449
> Project: Ignite
> Issue Type: Bug
> Reporter: Sergey Kosarev
> Priority: Major
>
> we have in
> org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtPartitionTopologyImpl#update(org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionExchangeId,
>
> org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionMap,
> boolean)
> currently we have something like this
> {code:java}
> ctx.database().checkpointReadLock();
> try {
> .......
> if (isStaleUpdate(cur, parts)) {
> ....
> return false;
> }
> .....
> }
> finally {
> ctx.database().checkpointReadUnlock();
> }
> {code}
> we'd better do not accquire those lock for isStaleUpdate == true branch. It
> can decrease contention as this method is hot (thousandsa invocations per
> minute) see
>
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