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Duplicate recommendation/check #545

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vladloskut opened this issue Feb 24, 2021 · 1 comment
Closed

Duplicate recommendation/check #545

vladloskut opened this issue Feb 24, 2021 · 1 comment
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@vladloskut
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From the Galera metrics part I found the following:

-------- Galera Metrics ----------------------------------------------------------------------------
[--] Galera is enabled.
[--] GCache is using 0B
[--] CPU core detected : 6

[--] wsrep_slave_threads: 24
[OK] wsrep_slave_threads is equal to 2, 3 or 4 times number of CPU(s)
[!!] gcs.fc_limit should be equal to 5 * wsrep_slave_threads
[--] wsrep parallel slave can cause frequent inconsistency crash.
[!!] gcs.fc_limit should be equal to 5 * wsrep_slave_threads
[OK] gcs.fc_factor is equal to 0.8
[OK] Flow control fraction seems to be OK (wsrep_flow_control_paused<=0.02)

As you can see gcs.fc_limit is duplicated as well as per recommendation part:

Variables to adjust:
max_connections (> 70)
wait_timeout (< 28800)
interactive_timeout (< 28800)
binlog_cache_size (16.0M)
innodb_buffer_pool_size (>= 198.4G) if possible.
innodb_buffer_pool_instances(=42)
gcs.fc_limit= wsrep_slave_threads * 5
Set wsrep_slave_threads to 1 in case of HA_ERR_FOUND_DUPP_KEY crash on slave
gcs.fc_limit= wsrep_slave_threads * 5
set up parameter wsrep_notify_cmd to be notify

Is this OK or something wrong on my machine?

Thanks in advance

jmrenouard added a commit that referenced this issue Mar 8, 2021
Duplicate recommendation/check #545
jmrenouard added a commit that referenced this issue Mar 8, 2021
Duplicate recommendation/check #545
@jmrenouard
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Removed in 17.22

Thanks @vladisalv

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