- Generated by
1.8.13
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Veil
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Code for setting and reading configuration data. More...
#include "postgres.h"#include "storage/fd.h"#include "utils/guc.h"#include "veil_version.h"#include "veil_funcs.h"Go to the source code of this file.
Functions | |
| int | veil_dbs_in_cluster () |
| Return the number of databases, within the database cluster, that will use Veil. More... | |
| int | veil_shared_hash_elems () |
| Return the number of entries that should be allocated for shared variables in our shared hashes. More... | |
| int | veil_shmem_context_size () |
| Return the amount of shared memory to be requested for each of the two shared memory contexts. More... | |
| void | veil_config_init () |
| Initialise Veil's use of GUC variables. | |
| void | veil_load_config () |
| Retrieve Veil's GUC variables for this session. | |
Variables | |
| static int | shared_hash_elems = 32 |
| The number of buckets to create in the hash for shared variables. More... | |
| static int | dbs_in_cluster = 2 |
| The number of databases within the db cluster that will use veil. More... | |
| static int | shmem_context_size = 16384 |
| The size in KBytes, of each of Veil's shared memory contexts. More... | |
Code for setting and reading configuration data.
Definition in file veil_config.c.
| int veil_dbs_in_cluster | ( | void | ) |
Return the number of databases, within the database cluster, that will use Veil.
Each such database will be allocated 2 chunks of shared memory (of shmem_context_size), and a single LWLock. It defaults to 1 and may be defined in postgresql.conf using eg: "veil.dbs_in_cluster = 2"
Definition at line 52 of file veil_config.c.
References dbs_in_cluster, and veil_load_config().
Referenced by _PG_init(), and get_shmem_context().
| int veil_shared_hash_elems | ( | void | ) |
Return the number of entries that should be allocated for shared variables in our shared hashes.
This defaults to 32 and may be defined in postgresql.conf using eg: "veil.shared_hash_elems = 64"
Definition at line 65 of file veil_config.c.
References shared_hash_elems, and veil_load_config().
Referenced by create_shared_hash().
| int veil_shmem_context_size | ( | void | ) |
Return the amount of shared memory to be requested for each of the two shared memory contexts.
This variable has no effect unless shared_preload_libraries has been defined in postgresql.conf to load the Veil shared library Note that this must be large enough to allocate at least one chunk of memory for each veil-using database in the Postgres cluster. It defaults to 16K and may be defined in postgresql.conf using eg: "veil.shmem_context_size = 16384"
Definition at line 82 of file veil_config.c.
References shmem_context_size, and veil_load_config().
Referenced by _PG_init(), and shmalloc_init().
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The number of buckets to create in the hash for shared variables.
This defaults to 32 and may be defined in postgresql.conf using eg: "veil.shared_hash_elems = 64"
Definition at line 26 of file veil_config.c.
Referenced by veil_config_init(), veil_load_config(), and veil_shared_hash_elems().
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The number of databases within the db cluster that will use veil.
Every veil-using database within the cluster will get the same allocation of shared memory.
Definition at line 33 of file veil_config.c.
Referenced by veil_config_init(), veil_dbs_in_cluster(), and veil_load_config().
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The size in KBytes, of each of Veil's shared memory contexts.
Veil will pre-allocate (from Postgres 8.2 onwards) twice this amount of shared memory, one for each context area. The default is 16384 Bytes and may be defined in postgresql.conf using eg: "veil.shmem_context_size = 8192"
Definition at line 42 of file veil_config.c.
Referenced by veil_config_init(), veil_load_config(), and veil_shmem_context_size().
1.8.13