MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 04/01/01 through 04/30/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 215,457 14,013,322
MED90 43,024 738,846
MED85 33,041 283,540
MED80 29,654 168,560
MED75 27,436 115,169
MED66 27,959 148,313
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 9,282 622,164
2-4 a.m. 2,530 441,094
4-6 a.m. 1,598 310,891
6-8 a.m. 5,617 553,922
8-10 a.m. 26,043 1,177,157
10-12 a.m. 60,366 2,239,520
12-2 p.m. 64,955 2,434,322
2-4 p.m. 78,316 2,689,103
4-6 p.m. 59,938 2,206,041
6-8 p.m. 31,508 1,267,110
8-10 p.m. 22,523 916,542
10-12 p.m. 13,895 609,884
__________ _____________ _________________
Total: 376,571 15,467,750
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 2,039
Davis 2,372
Irvine 399
Los Angeles 2,940
Riverside 348
San Diego 2,913
San Francisco 5,039
Santa Barbara 155
Santa Cruz 76
Lawrence Berkeley 361
Lawrence Livermore 95
Los Alamos 5
MELWEB 299,861
Searchlight 57,467
Other - UC 244
Other-Network UC 2,257
_____
376,571
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 19,296
Davis 29,153
Irvine 8,314
Los Angeles 37,302
Riverside 1,882
San Diego 28,443
San Francisco 60,303
Santa Barbara 1,873
Santa Cruz 532
Lawrence Berkeley 1,898
Lawrence Livermore 893
Los Alamos 46
MELWEB 12,891,146
Searchlight 2,353,175
Other - UC 1,668
Other-Network UC 31,826
_____
15,467,750
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:00
Average session length (minutes:seconds) 18:01
Longest session recorded (minutes:seconds) 381:38
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 463.3
Retrievals per search - standard deviation 6047.7
Percent of searches completed with 0 results 33.0%
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 376,571 11.0%
PRESENT 2,862,990 83.9%
INIT or CLOSE 169,267 5.0%
OTHER 2,442 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 22,722 4.3% 8,841 38.9% 4 962.7 4630.7
PERSONAL AUTHOR 105278 20.1% 29,452 28.0% 7 99.3 3130.3
TITLE WORD 42,477 8.1% 16,076 37.8% 3 205.4 3117.0
SUBSET 766 0.1% 176 23.0% 34 298.5 1144.4
SUBJECT WORD 682 0.1% 345 50.6% 10 429.7 4042.3
SUBJECT 10,220 2.0% 5,061 49.5% 22 1009.8 6374.7
EXACT SUBJECT 20,887 4.0% 5,064 24.2% 36 551.0 3249.1
MAJOR SUBJECT 614 0.1% 209 34.0% 27 296.8 1336.7
EXACT MAJOR SUBJ 2,136 0.4% 409 19.1% 20 253.2 883.8
EXACT TITLE 3,156 0.6% 1,769 56.1% 1 19.1 244.5
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,686 0.9% 1,146 24.5% 475 2005.3 4136.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 97 0.0% 34 35.1% 55 184.3 269.8
KEYWORD 228443 43.7% 78,884 34.5% 19 904.1 9288.2
DATE 9,149 1.7% 2,165 23.7% 6 153.8 1232.1
LANGUAGE 27,125 5.2% 6,946 25.6% 30 489.9 3736.4
UNIQUE ID 1,121 0.2% 329 29.3% 1 1.4 9.7
ADDED 5,471 1.0% 1,507 27.5% 19 92.8 511.3
PUB TYPE 11,950 2.3% 2,737 22.9% 24 198.6 1526.7
AUTHOR AFFIL. 2,987 0.6% 1,322 44.3% 10 158.2 1392.4
CHEMICAL NAME 133 0.0% 88 66.2% 126 596.2 606.7
EXACT CHEMICAL 7 0.0% 4 57.1% 126 1945.0 3248.1
AT 19,779 3.8% 5,789 29.3% 24 696.4 4097.5
AGE 1,133 0.2% 275 24.3% 32 283.4 1041.4
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 569 0.1% 125 22.0% 69 592.9 2641.9
XXS 964 0.2% 409 42.4% 12 818.9 9553.0
XMXS 365 0.1% 104 28.5% 20 278.5 1675.3
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 243 0.0% 206 84.8% 14 445.6 1431.0
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 100,232 26.6% 32,465 32.4% 8 331.8 4451.7
Single 276,339 73.4% 91,720 33.2% 17 823.2 8188.3
PRESENT commands, by type:
MARC 22.5%
OPAC 43.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS