# Mysql 5.7 memory usage problem OOM **URL:** \ **Category:** Percona Server for MySQL 5.7\ **Created:** [October 30, 2018, 8:05am UTC](https://forums.percona.com/t/mysql-5-7-memory-usage-problem-oom/6657 "2018-10-30T08:05:16Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![zsebacsi](https://avatars.discourse-cdn.com/v4/letter/z/a5b964/32.png) [@zsebacsi](https://forums.percona.com/u/zsebacsi)\ **Post date:** [October 30, 2018, 8:05am UTC](https://forums.percona.com/t/mysql-5-7-memory-usage-problem-oom/6657/1 "2018-10-30T08:05:16Z")
Hi We are using a 3 node galera cluster with Mysql 5.7 5.7.23-23-57-log on ubuntu 16.04 x64, 64G ram + 64g swap my problem is that mysql memory usage is constantly growing and after a few days it runs to an OOM and got killed. I’ve collected the following graphs from munin. in the configuration I do not see any extrem value, we have already lowered them, no success. Tried: update mysql, update OS, update kernel, reboot, half all the parameters, no luck concurrent running user number is about 6, sleep is about 130 (connection pooling is in effect on the application) I ran out of ideas, dunno how to troubleshoot this issue. thanks if you can point me to the right direction. details from config: key-buffer-size = 4M # 32M max-allowed-packet = 12M max-connect-errors = 1000000 tmp-table-size = 16M max-heap-table-size = 16M query-cache-type = 0 query-cache-size = 0 max-connections = 1000 thread-cache-size = 100 open-files-limit = 65535 table-definition-cache = 2048 table-open-cache = 10120 innodb-flush-method = O\_DIRECT innodb-log-files-in-group = 2 #zcs - half the orignal innodb-log-file-size = 24M innodb-flush-log-at-trx-commit = 1 innodb-file-per-table = 1 innodb-buffer-pool-size = 8G #16G ![photoid=52756](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/5/5a1d715fe478de6ffb142a5cd9d8d85656f2df28.png) ![photoid=52757](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/a/a11836f2cc615a7c61905984dcf636d73a05c922.png) ![photoid=52758](https://us1.discourse-cdn.com/flex019/uploads/percona1/original/2X/4/43864347e7526db927d3fe644de79f9495080c4c.png)