MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 03/31/01 through 04/06/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 48,425 3,437,899
MED90 9,172 134,480
MED85 6,763 59,961
MED80 5,993 31,858
MED75 5,566 22,811
MED66 5,589 23,805
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,888 176,209
2-4 a.m. 486 215,672
4-6 a.m. 465 191,230
6-8 a.m. 1,333 218,095
8-10 a.m. 5,708 286,137
10-12 a.m. 13,065 486,509
12-2 p.m. 14,743 564,715
2-4 p.m. 18,372 592,522
4-6 p.m. 13,053 434,937
6-8 p.m. 5,949 253,285
8-10 p.m. 4,099 177,968
10-12 p.m. 2,347 113,535
__________ _____________ _________________
Total: 81,508 3,710,814
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 572
Davis 760
Irvine 64
Los Angeles 774
Riverside 30
San Diego 706
San Francisco 1,336
Santa Barbara 57
Santa Cruz 8
Lawrence Berkeley 193
Lawrence Livermore 12
Los Alamos 0
MELWEB 66,295
Searchlight 10,122
Other - UC 71
Other-Network UC 508
_____
81,508
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,341
Davis 10,945
Irvine 3,180
Los Angeles 6,902
Riverside 71
San Diego 10,367
San Francisco 14,435
Santa Barbara 425
Santa Cruz 109
Lawrence Berkeley 565
Lawrence Livermore 153
Los Alamos 0
MELWEB 2,664,413
Searchlight 991,082
Other - UC 507
Other-Network UC 4,319
_____
3,710,814
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 3.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 0.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:14
Average session length (minutes:seconds) 19:04
Longest session recorded (minutes:seconds) 219:10
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 465.9
Retrievals per search - standard deviation 5772.9
Percent of searches completed with 0 results 31.7%
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 81,508 9.6%
PRESENT 734,678 86.2%
INIT or CLOSE 35,790 4.2%
OTHER 626 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 5,423 4.8% 2,076 38.3% 4 957.0 4527.7
PERSONAL AUTHOR 24,824 21.9% 6,737 27.1% 7 106.4 4402.6
TITLE WORD 9,377 8.3% 3,475 37.1% 3 263.6 2305.3
SUBSET 161 0.1% 24 14.9% 25 174.0 481.9
SUBJECT WORD 160 0.1% 68 42.5% 12 289.9 1232.1
SUBJECT 2,440 2.2% 1,282 52.5% 32 792.3 5113.5
EXACT SUBJECT 4,714 4.2% 889 18.9% 37 451.3 2208.0
MAJOR SUBJECT 108 0.1% 41 38.0% 24 72.6 92.9
EXACT MAJOR SUBJ 597 0.5% 87 14.6% 27 243.1 790.4
EXACT TITLE 642 0.6% 386 60.1% 1 3.3 14.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,055 0.9% 268 25.4% 363 1885.4 3892.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 11 0.0% 5 45.5% 23 94.8 184.7
KEYWORD 46,931 41.5% 15,749 33.6% 19 919.1 9027.7
DATE 2,361 2.1% 507 21.5% 6 128.8 1062.6
LANGUAGE 5,617 5.0% 1,385 24.7% 32 496.0 4770.3
UNIQUE ID 271 0.2% 72 26.6% 1 2.5 19.4
ADDED 1,173 1.0% 214 18.2% 28 191.3 1009.1
PUB TYPE 2,684 2.4% 591 22.0% 24 170.7 543.5
AUTHOR AFFIL. 619 0.5% 281 45.4% 9 416.0 2597.7
CHEMICAL NAME 6 0.0% 1 16.7% 1 5.0 8.4
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 3,386 3.0% 928 27.4% 25 1273.1 13001.2
AGE 269 0.2% 42 15.6% 45 350.5 1273.0
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 89 0.1% 21 23.6% 57 287.4 684.1
XXS 155 0.1% 50 32.3% 44 746.2 3593.9
XMXS 55 0.0% 21 38.2% 37 120.0 229.1
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 41 0.0% 37 90.2% 73 1231.5 2366.6
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 22,293 27.3% 7,016 31.5% 8 382.1 7188.1
Single 59,215 72.6% 18,840 31.8% 17 796.1 6890.6
PRESENT commands, by type:
MARC 20.0%
OPAC 52.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS