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Add configuration flags for trickle time/percentage

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This commit is contained in:
Dave Smith 2009-03-02 13:33:03 -07:00
parent 6e9d6784ae
commit 3c84d5dd44
1 changed files with 24 additions and 2 deletions
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26
c_src/bdberl_drv.c
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@ -97,8 +97,8 @@ static unsigned int G_DEADLOCK_CHECK_INTERVAL = 100; /* Milliseconds between che
*/
static ErlDrvTid G_TRICKLE_THREAD = 0;
static unsigned int G_TRICKLE_ACTIVE = 1;
static unsigned int G_TRICKLE_INTERVAL = 60 * 15; /* Seconds between trickle writes */
static unsigned int G_TRICKLE_PERCENTAGE = 10; /* Desired % of clean pages in cache */
static unsigned int G_TRICKLE_INTERVAL = 60 * 5; /* Seconds between trickle writes */
static unsigned int G_TRICKLE_PERCENTAGE = 50; /* Desired % of clean pages in cache */
/**
@ -214,6 +214,28 @@ DRIVER_INIT(bdberl_drv)
}
}
// Use the BDBERL_TRICKLE_TIME and BDBERL_TRICKLE_PERCENTAGE to control how often
// the trickle writer runs and what percentage of pages should be flushed.
char* trickle_time_str = getenv("BDBERL_TRICKLE_TIME");
if (trickle_time_str != 0)
{
G_TRICKLE_INTERVAL = atoi(trickle_time_str);
if (G_TRICKLE_INTERVAL <= 0)
{
G_TRICKLE_INTERVAL = 60 * 5;
}
}
char* trickle_percentage_str = getenv("BDBERL_TRICKLE_PERCENTAGE");
if (trickle_percentage_str != 0)
{
G_TRICKLE_PERCENTAGE = atoi(trickle_percentage_str);
if (G_TRICKLE_PERCENTAGE <= 0)
{
G_TRICKLE_PERCENTAGE = 50;
}
}
// Make sure we can distiguish between lock timeouts and deadlocks
G_DB_ENV->set_flags(G_DB_ENV, DB_TIME_NOTGRANTED, 1);