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[Evgeniy Stepchenko <evgeny.stepchenko@xxxxxxxxxxx>]

** Changed in: percona-xtradb
   Importance: Undecided => Medium

** Changed in: percona-patches
   Importance: Undecided => Medium

-- 
Adaptive search scalability
https://bugs.launchpad.net/bugs/331659
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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 ?