[#MDEV-15648] MariaDB becomes often unresponsive

Since we migrated from MariaDb 5.5 to MariaDB 10.2.13, MariaDBServer become often unreponsive:

Example:

On 2018-03-23, MariaDb hang at 8:28. At this times, there is an attempt to restaure a dump generate with MySQL 5.5.18 for Win64.
.

Log

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140401323267840 has waited at row0row.cc line 988 for 241.00 seconds the semaphore:

S-lock on RW-latch at 0x7fbb5ed79b18 created in file buf0buf.cc line 1471

a writer (thread id 140401340053248) has reserved it in mode  exclusive

number of readers 0, waiters flag 1, lock_word: ffffffffdfffffff

Last time read locked in file row0row.cc line 988

Last time write locked in file btr0cur.cc line 1917

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140401340053248 has waited at btr0cur.cc line 1917 for 241.00 seconds the semaphore:

X-lock (wait_ex) on RW-latch at 0x7fbd21a936a0 created in file buf0buf.cc line 1471

a writer (thread id 140401340053248) has reserved it in mode  wait exclusive

number of readers 1, waiters flag 0, lock_word: ffffffffffffffff

Last time read locked in file row0row.cc line 988

Last time write locked in file buf0flu.cc line 1236

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140400859473664 has waited at row0ins.cc line 1926 for 241.00 seconds the semaphore:

S-lock on RW-latch at 0x55b134618c50 created in file dict0dict.cc line 1107

a writer (thread id 140401408464640) has reserved it in mode  wait exclusive

number of readers 3, waiters flag 1, lock_word: fffffffffffffffd

Last time read locked in file row0ins.cc line 1926

Last time write locked in file row0mysql.cc line 3383

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140401314875136 has waited at row0purge.cc line 853 for 241.00 seconds the semaphore:

S-lock on RW-latch at 0x55b134618c50 created in file dict0dict.cc line 1107

a writer (thread id 140401408464640) has reserved it in mode  wait exclusive

number of readers 3, waiters flag 1, lock_word: fffffffffffffffd

Last time read locked in file row0ins.cc line 1926

Last time write locked in file row0mysql.cc line 3383

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140401331660544 has waited at fsp0fsp.cc line 2821 for 241.00 seconds the semaphore:

X-lock on RW-latch at 0x55b1345efe40 created in file fil0fil.cc line 1551

a writer (thread id 140401340053248) has reserved it in mode  exclusive

number of readers 0, waiters flag 1, lock_word: 0

Last time read locked in file not yet reserved line 0

Last time write locked in file fsp0fsp.cc line 2821

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140401408464640 has waited at row0mysql.cc line 3383 for 241.00 seconds the semaphore:

X-lock (wait_ex) on RW-latch at 0x55b134618c50 created in file dict0dict.cc line 1107

a writer (thread id 140401408464640) has reserved it in mode  wait exclusive

number of readers 3, waiters flag 1, lock_word: fffffffffffffffd

Last time read locked in file row0ins.cc line 1926

Last time write locked in file row0mysql.cc line 3383

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140400655324928 has waited at row0ins.cc line 1926 for 241.00 seconds the semaphore:

S-lock on RW-latch at 0x55b134618c50 created in file dict0dict.cc line 1107

a writer (thread id 140401408464640) has reserved it in mode  wait exclusive

number of readers 3, waiters flag 1, lock_word: fffffffffffffffd

Last time read locked in file row0ins.cc line 1926

Last time write locked in file row0mysql.cc line 3383

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140400030902016 has waited at row0mysql.cc line 1783 for 241.00 seconds the semaphore:

S-lock on RW-latch at 0x55b134618c50 created in file dict0dict.cc line 1107

a writer (thread id 140401408464640) has reserved it in mode  wait exclusive

number of readers 3, waiters flag 1, lock_word: fffffffffffffffd

Last time read locked in file row0ins.cc line 1926

Last time write locked in file row0mysql.cc line 3383

2018-03-23  8:32:43 140401445676800 [Warning] InnoDB: A long semaphore wait:

--Thread 140400016656128 has waited at row0ins.cc line 1926 for 241.00 seconds the semaphore:

S-lock on RW-latch at 0x55b134618c50 created in file dict0dict.cc line 1107

a writer (thread id 140401408464640) has reserved it in mode  wait exclusive

number of readers 3, waiters flag 1, lock_word: fffffffffffffffd

Last time read locked in file row0ins.cc line 1926

Last time write locked in file row0mysql.cc line 3383

2018-03-23  8:32:43 140401445676800 [Note] InnoDB: A semaphore wait:

--Thread 140400038479616 has waited at row0upd.cc line 183 for 150.00 seconds the semaphore:

S-lock on RW-latch at 0x55b134618c50 created in file dict0dict.cc line 1107

a writer (thread id 140401408464640) has reserved it in mode  wait exclusive

number of readers 3, waiters flag 1, lock_word: fffffffffffffffd

Last time read locked in file row0ins.cc line 1926

Last time write locked in file row0mysql.cc line 3383

2018-03-23  8:32:43 140401445676800 [Note] InnoDB: A semaphore wait:

-- MySQL dump 10.13  Distrib 5.5.18, for Win64 (x86)

--

-- Host: 127.0.0.1    Database: db_horizon_transport_rodr04_01

-- ------------------------------------------------------

-- Server version	5.5.18

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;

/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;

/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;

/*!40101 SET NAMES latin1 */;

/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;

/*!40103 SET TIME_ZONE='+00:00' */;

/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;

/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;

/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;

/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--

-- Current Database: `db_horizon_transport_rodr04_01`

--

/*!40000 DROP DATABASE IF EXISTS `db_horizon_transport_rodr04_01`*/;

CREATE DATABASE /*!32312 IF NOT EXISTS*/ `db_horizon_transport_rodr04_01` /*!40100 DEFAULT CHARACTER SET latin1 */;

USE `db_horizon_transport_rodr04_01`;

--

-- Table structure for table `db_version_ver`

--

DROP TABLE IF EXISTS `db_version_ver`;

/*!40101 SET @saved_cs_client     = @@character_set_client */;

/*!40101 SET character_set_client = utf8 */;

CREATE TABLE `db_version_ver` (

  `ver_id` int(11) NOT NULL AUTO_INCREMENT,

  `ver_num` int(11) DEFAULT NULL,

  `ver_libelle` varchar(45) DEFAULT NULL,

  `ver_date` datetime DEFAULT NULL,

  PRIMARY KEY (`ver_id`)

) ENGINE=InnoDB AUTO_INCREMENT=877 DEFAULT CHARSET=latin1;

/*!40101 SET character_set_client = @saved_cs_client */;

[MDEV-15648] MariaDB becomes often unresponsive Created: 2018-03-23 Updated: 2018-05-28 Resolved: 2018-05-28
Status:	Closed
Project:	MariaDB Server
Component/s:	Storage Engine - InnoDB
Affects Version/s:	10.2.13
Fix Version/s:	N/A