On Thu, Apr 9, 2009 at 11:55 AM, Evgeniy Stepchenko
<email address hidden> wrote:
> ** Changed in: percona-xtradb
> Importance: Undecided => Medium
>
> ** Changed in: percona-patches
> Importance: Undecided => Medium
>
> --
> Adaptive search scalability
> https://bugs.launchpad.net/bugs/331659
> You received this bug notification because you are a member of Percona
> developers, which is the registrant for Percona patches.
>
> Status in Patches for MySQL by Percona: New
> Status in Percona XtraDB Storage Engine for MySQL: New
>
> Bug description:
> During some workloads I see a lot of output
> --Thread 1164450128 has waited at btr0sea.c line 1383 for 0.00 seconds the semaphore:
> X-lock on RW-latch at 0x2aaaac50e0b8 created in file btr0sea.c line 139
> a writer (thread id 1164450128) has reserved it in mode wait exclusive
> number of readers 1, waiters flag 1
> Last time read locked in file btr0sea.c line 746
> Last time write locked in file btr0sea.c line 1383
> though the waits are very small though -- 0.00
>
> What we can do there ?
Does SHOW MUTEX STATUS report a lot of contention for it?
On Thu, Apr 9, 2009 at 11:55 AM, Evgeniy Stepchenko /bugs.launchpad .net/bugs/ 331659
<email address hidden> wrote:
> ** Changed in: percona-xtradb
> Importance: Undecided => Medium
>
> ** Changed in: percona-patches
> Importance: Undecided => Medium
>
> --
> Adaptive search scalability
> https:/
> You received this bug notification because you are a member of Percona
> developers, which is the registrant for Percona patches.
>
> Status in Patches for MySQL by Percona: New
> Status in Percona XtraDB Storage Engine for MySQL: New
>
> Bug description:
> During some workloads I see a lot of output
> --Thread 1164450128 has waited at btr0sea.c line 1383 for 0.00 seconds the semaphore:
> X-lock on RW-latch at 0x2aaaac50e0b8 created in file btr0sea.c line 139
> a writer (thread id 1164450128) has reserved it in mode wait exclusive
> number of readers 1, waiters flag 1
> Last time read locked in file btr0sea.c line 746
> Last time write locked in file btr0sea.c line 1383
> though the waits are very small though -- 0.00
>
> What we can do there ?
Does SHOW MUTEX STATUS report a lot of contention for it?
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--
Mark Callaghan
<email address hidden>