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Optimized metric fetching.

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This commit is contained in:
Jon Ziebell 2021-02-22 19:47:46 -05:00
parent bb93805e20
commit bdcb59a2c4
1 changed files with 7 additions and 2 deletions
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9
api/thermostat.php
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@ -491,17 +491,22 @@ class thermostat extends cora\crud {
} }
} }
$memory_limit = 16; // mb
$memory_per_thermostat = 0.0054; // mb
$limit_start = 0; $limit_start = 0;
$limit_count = 250; $limit_count = round($memory_limit / $memory_per_thermostat);
/** /**
* Selecting lots of rows can eventually run PHP out of memory, so chunk * Selecting lots of rows can eventually run PHP out of memory, so chunk
* this up into several queries to avoid that. * this up into several queries to avoid that.
*/ */
do { do {
var_dump('before = ' . memory_get_usage());
$result = $this->database->query(' $result = $this->database->query('
select select
* thermostat_id,
profile
from from
thermostat thermostat
where ' . where ' .