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Collect INFORMATION_SCHEMA.INNODB_LOCK_WAITS data.

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Daniel Nichter
2011-12-08 13:33:50 -07:00
parent 1c495936c8
commit 9ec71db008
1 changed files with 44 additions and 0 deletions
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44
lib/bash/collect.sh
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@@ -159,6 +159,13 @@ collect() {
>> "$d/$p-mysqladmin" 2>&1 &
local mysqladmin_pid=$!
local have_lock_waits_table=0
$MYSQL_CMD "$EXT_ARGV" -e "SHOW TABLES FROM INFORMATION_SCHEMA" \
| grep -qi "INNODB_LOCK_WAITS"
if [ $? -eq 0 ]; then
have_lock_waits_table=1
fi
# This loop gathers data for the rest of the duration, and defines the time
# of the whole job.
echo "Loop start: $(date +'TS %s.%N %F %T')"
@@ -189,6 +196,10 @@ collect() {
($CMD_MYSQL "$EXT_ARGV" -e "SHOW FULL PROCESSLIST\G" 2>&1; echo $ts) \
>> "$d/$p-processlist"
if [ $have_lock_waits_table -eq 1 ]; then
(lock_waits 2>&1; echo $ts) >>"$d/$p-lock-waits"
fi
done
echo "Loop end: $(date +'TS %s.%N %F %T')"
@@ -246,6 +257,39 @@ open_tables() {
fi
}
lock_waits() {
local sql1="SELECT
CONCAT('thread ', b.trx_mysql_thread_id, ' from ', p.host) AS who_blocks,
IF(p.command = \"Sleep\", p.time, 0) AS idle_in_trx,
MAX(TIMESTAMPDIFF(SECOND, r.trx_wait_started, CURRENT_TIMESTAMP)) AS max_wait_time,
COUNT(*) AS num_waiters
FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS AS w
INNER JOIN INFORMATION_SCHEMA.INNODB_TRX AS b ON b.trx_id = w.blocking_trx_id
INNER JOIN INFORMATION_SCHEMA.INNODB_TRX AS r ON r.trx_id = w.requesting_trx_id
LEFT JOIN INFORMATION_SCHEMA.PROCESSLIST AS p ON p.id = b.trx_mysql_thread_id
GROUP BY who_blocks ORDER BY num_waiters DESC\G"
$CMD_MYSQL "$EXT_ARGV" -e "$sql1"
local sql2="SELECT
r.trx_id AS waiting_trx_id,
r.trx_mysql_thread_id AS waiting_thread,
TIMESTAMPDIFF(SECOND, r.trx_wait_started, CURRENT_TIMESTAMP) AS wait_time,
r.trx_query AS waiting_query,
l.lock_table AS waiting_table_lock,
b.trx_id AS blocking_trx_id, b.trx_mysql_thread_id AS blocking_thread,
SUBSTRING(p.host, 1, INSTR(p.host, ':') - 1) AS blocking_host,
SUBSTRING(p.host, INSTR(p.host, ':') +1) AS blocking_port,
IF(p.command = \"Sleep\", p.time, 0) AS idle_in_trx,
b.trx_query AS blocking_query
FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS AS w
INNER JOIN INFORMATION_SCHEMA.INNODB_TRX AS b ON b.trx_id = w.blocking_trx_id
INNER JOIN INFORMATION_SCHEMA.INNODB_TRX AS r ON r.trx_id = w.requesting_trx_id
INNER JOIN INFORMATION_SCHEMA.INNODB_LOCKS AS l ON w.requested_lock_id = l.lock_id
LEFT JOIN INFORMATION_SCHEMA.PROCESSLIST AS p ON p.id = b.trx_mysql_thread_id
ORDER BY wait_time DESC\G"
$CMD_MYSQL "$EXT_ARGV" -e "$sql2"
}
# ###########################################################################
# End collect package
# ###########################################################################