MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/01/00 through 10/31/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 218,680 11,687,112
MED90 44,899 786,681
MED85 33,903 273,962
MED80 30,060 148,833
MED75 28,455 99,538
MED66 28,913 98,132
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 10,300 245,734
2-4 a.m. 2,296 77,323
4-6 a.m. 1,404 56,060
6-8 a.m. 4,952 187,032
8-10 a.m. 28,027 952,537
10-12 a.m. 64,509 2,144,990
12-2 p.m. 69,073 2,273,374
2-4 p.m. 81,048 2,835,206
4-6 p.m. 60,994 2,058,686
6-8 p.m. 29,205 1,106,367
8-10 p.m. 19,649 695,542
10-12 p.m. 13,453 461,407
__________ _____________ _________________
Total: 384,910 13,094,258
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 980
Davis 3,492
Irvine 741
Los Angeles 2,320
Riverside 233
San Diego 3,463
San Francisco 5,246
Santa Barbara 84
Santa Cruz 234
Lawrence Berkeley 237
Lawrence Livermore 52
Los Alamos 6
MELWEB 300,870
Searchlight 64,186
Other - UC 652
Other-Network UC 2,114
_____
384,910
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 23,610
Davis 35,522
Irvine 11,378
Los Angeles 20,961
Riverside 1,666
San Diego 30,302
San Francisco 99,278
Santa Barbara 493
Santa Cruz 3,682
Lawrence Berkeley 2,510
Lawrence Livermore 447
Los Alamos 0
MELWEB 12,657,199
Searchlight 176,398
Other - UC 4,382
Other-Network UC 26,430
_____
13,094,258
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.7
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:51
Average session length (minutes:seconds) 17:18
Longest session recorded (minutes:seconds) 300:52
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 520.3
Retrievals per search - standard deviation 6804.8
Percent of searches completed with 0 results 33.8%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 384,910 13.3%
PRESENT 2,325,100 80.5%
INIT or CLOSE 176,458 6.1%
OTHER 2,691 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 23,362 4.2% 9,328 39.9% 4 972.2 7898.7
PERSONAL AUTHOR 104160 18.9% 30,444 29.2% 7 87.3 790.3
TITLE WORD 37,679 6.8% 14,273 37.9% 3 206.6 2283.3
SUBSET 1,214 0.2% 281 23.1% 26 232.5 1176.3
SUBJECT WORD 986 0.2% 502 50.9% 6 1682.3 15230.6
SUBJECT 12,428 2.2% 6,236 50.2% 22 540.9 3347.2
EXACT SUBJECT 26,489 4.8% 6,412 24.2% 32 577.3 3827.5
MAJOR SUBJECT 1,310 0.2% 433 33.1% 10 438.3 2479.1
EXACT MAJOR SUBJ 2,715 0.5% 518 19.1% 22 312.8 1794.9
EXACT TITLE 3,190 0.6% 1,944 60.9% 1 20.9 154.7
TREE NUMBER 15 0.0% 4 26.7% 66 837.9 2433.1
EXACT JOURNAL 5,916 1.1% 2,203 37.2% 403 1741.8 3378.1
MAJOR TREE NUM 2 0.0% 0 0.0% 64 64.0 0.0
CAS 115 0.0% 48 41.7% 24 810.5 2963.9
KEYWORD 237030 42.9% 82,775 34.9% 18 1039.3 10212.6
DATE 9,056 1.6% 2,093 23.1% 6 202.4 1806.6
LANGUAGE 33,839 6.1% 9,180 27.1% 28 468.1 3170.1
UNIQUE ID 1,826 0.3% 638 34.9% 1 1.1 2.1
ADDED 5,428 1.0% 2,858 52.7% 4 12.5 23.3
PUB TYPE 13,902 2.5% 3,361 24.2% 23 181.1 1372.2
AUTHOR AFFIL. 3,735 0.7% 1,831 49.0% 8 86.8 1048.2
CHEMICAL NAME 90 0.0% 42 46.7% 4 1065.9 3879.8
EXACT CHEMICAL 2 0.0% 2 100% 0 0.0 0.0
AT 24,250 4.4% 7,684 31.7% 23 723.7 5592.3
AGE 1,460 0.3% 414 28.4% 18 174.2 587.8
ISN 5 0.0% 3 60.0% 1 1.0 0.0
ARTICLE 746 0.1% 196 26.3% 40 417.7 1282.8
XXS 943 0.2% 371 39.3% 16 3812.9 22171.9
XMXS 521 0.1% 198 38.0% 19 184.8 734.5
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 113 0.0% 74 65.5% 14 421.6 904.2
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 108,940 28.3% 37,002 34.0% 8 341.1 3350.7
Single 275,970 71.7% 92,949 33.7% 17 960.1 9621.6
PRESENT commands, by type:
MARC 31.0%
OPAC 29.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS