3.4.1.2 nsslapd-cache-autosize
This performance tuning-related attribute, which is turned off by default, specifies the percentage of free memory to use for all the combined caches. For example, if the value is set to 80, then 80 percent of the remaining free memory would be claimed for the cache. To run other servers on the machine, then set the value lower. Setting the value to 0 turns off the cache autosizing and uses the normal nsslapd-cachememsize and nsslapd-dbcachesize attributes.
NOTE:
If the nsslapd-cache-autosize attribute and nsslapd-cache-autosize-split attribute are both set to high values, such as 100, then the Directory Server may fail to start and return an error message. To fix this issue, reset the nsslapd-cache-autosize and nsslapd-cache-autosize-split attributes to a more reasonable level. For example:
nsslapd-cache-autosize: 60
nsslapd-cache-autosize-split: 60
Parameter | Description |
Entry DN | cn=config, cn=ldbm database, cn=plugins, cn=config |
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Valid Range | 0 (turns cache autosizing off) to 100 |
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Default Value | -1 |
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Syntax | Integer |
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Example | nsslapd-cache-autosize: 80 |
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3.4.1.3 nsslapd-cache-autosize-split
This performance tuning-related attribute specifies the percentage of cache space to allocate to the database cache. For example, setting this to 60 would give the database cache 60 percent of the cache space and split the remaining 40 percent between the backend entry caches. That is, if there were two databases, each of them would receive 20 percent. This attribute only applies when the nsslapd-cache-autosizeattribute has a value of 0.
NOTE:
If the nsslapd-cache-autosize attribute and nsslapd-cache-autosize-split attribute are both set to high values, such as 100, then the Directory Server may fail to start and return error message. To fix this issue, reset the nsslapd-cache-autosize and nsslapd-cache-autosize-split attributes to a more reasonable level. For example:
nsslapd-cache-autosize: 60
nsslapd-cache-autosize-split: 60
Parameter | Description |
Entry DN | cn=config, cn=ldbm database, cn=plugins, cn=config |
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Valid Range | 0 to 99 |
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Default Value | 50 (This will not necessarily optimize operations.) |
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Syntax | Integer |
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Example | nsslapd-cache-autosize-split: 50 |
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3.4 Database plug-in attributes 133